diff --git a/src/ReleaseOrchestrator/__Apps/StellaOps.ReleaseOrchestrator.WebApi/Program.cs b/src/ReleaseOrchestrator/__Apps/StellaOps.ReleaseOrchestrator.WebApi/Program.cs
index 6bd28de77..d971c32b9 100644
--- a/src/ReleaseOrchestrator/__Apps/StellaOps.ReleaseOrchestrator.WebApi/Program.cs
+++ b/src/ReleaseOrchestrator/__Apps/StellaOps.ReleaseOrchestrator.WebApi/Program.cs
@@ -104,6 +104,10 @@ app.MapAuditEndpoints();
 app.MapFirstSignalEndpoints();
 app.MapScriptsEndpoints();
 
+// Legacy /api/v1/jobengine/* compatibility endpoints
+// (gateway still routes these paths here from the UI)
+app.MapJobEngineLegacyEndpoints();
+
 app.TryRefreshStellaRouterEndpoints(routerEnabled);
 
 await app.RunAsync();
diff --git a/src/ReleaseOrchestrator/__Libraries/StellaOps.ReleaseOrchestrator.Persistence/Postgres/PostgresAuditRepository.cs b/src/ReleaseOrchestrator/__Libraries/StellaOps.ReleaseOrchestrator.Persistence/Postgres/PostgresAuditRepository.cs
new file mode 100644
index 000000000..4d7c96441
--- /dev/null
+++ b/src/ReleaseOrchestrator/__Libraries/StellaOps.ReleaseOrchestrator.Persistence/Postgres/PostgresAuditRepository.cs
@@ -0,0 +1,507 @@
+using Microsoft.Extensions.Logging;
+using Npgsql;
+using StellaOps.ReleaseOrchestrator.Persistence.Domain;
+using StellaOps.ReleaseOrchestrator.Persistence.Hashing;
+using StellaOps.ReleaseOrchestrator.Persistence.Repositories;
+
+namespace StellaOps.ReleaseOrchestrator.Persistence.Postgres;
+
+/// <summary>
+/// PostgreSQL implementation of the audit repository for release-orchestrator.
+/// Uses raw SQL (no EF Core) for a lean dependency footprint.
+/// </summary>
+public sealed class PostgresAuditRepository : IAuditRepository
+{
+    private const string InsertEntrySql = """
+        INSERT INTO audit_entries (
+            entry_id, tenant_id, event_type, resource_type, resource_id, actor_id, actor_type,
+            actor_ip, user_agent, http_method, request_path, old_state, new_state, description,
+            correlation_id, previous_entry_hash, content_hash, sequence_number, occurred_at, metadata)
+        VALUES (
+            @entry_id, @tenant_id, @event_type, @resource_type, @resource_id, @actor_id, @actor_type,
+            @actor_ip, @user_agent, @http_method, @request_path, @old_state::jsonb, @new_state::jsonb, @description,
+            @correlation_id, @previous_entry_hash, @content_hash, @sequence_number, @occurred_at, @metadata::jsonb)
+        """;
+
+    private const string GetSequenceSql = """
+        SELECT next_seq, prev_hash FROM next_audit_sequence(@tenant_id)
+        """;
+
+    private const string UpdateSequenceHashSql = """
+        SELECT update_audit_sequence_hash(@tenant_id, @content_hash)
+        """;
+
+    private const string VerifyChainSql = """
+        SELECT is_valid, invalid_entry_id, invalid_sequence, error_message
+          FROM verify_audit_chain(@tenant_id, @start_seq, @end_seq)
+        """;
+
+    private const string GetSummarySql = """
+        SELECT total_entries, entries_since, event_types, unique_actors, unique_resources, earliest_entry, latest_entry
+          FROM get_audit_summary(@tenant_id, @since)
+        """;
+
+    private const string GetByIdSql = """
+        SELECT entry_id, tenant_id, event_type, resource_type, resource_id, actor_id, actor_type,
+               actor_ip, user_agent, http_method, request_path, old_state, new_state, description,
+               correlation_id, previous_entry_hash, content_hash, sequence_number, occurred_at, metadata
+          FROM audit_entries
+         WHERE tenant_id = @tenant_id AND entry_id = @entry_id
+        """;
+
+    private const string ListSql = """
+        SELECT entry_id, tenant_id, event_type, resource_type, resource_id, actor_id, actor_type,
+               actor_ip, user_agent, http_method, request_path, old_state, new_state, description,
+               correlation_id, previous_entry_hash, content_hash, sequence_number, occurred_at, metadata
+          FROM audit_entries
+         WHERE tenant_id = @tenant_id
+        """;
+
+    private const string GetLatestSql = """
+        SELECT entry_id, tenant_id, event_type, resource_type, resource_id, actor_id, actor_type,
+               actor_ip, user_agent, http_method, request_path, old_state, new_state, description,
+               correlation_id, previous_entry_hash, content_hash, sequence_number, occurred_at, metadata
+          FROM audit_entries
+         WHERE tenant_id = @tenant_id
+         ORDER BY sequence_number DESC
+         LIMIT 1
+        """;
+
+    private const string GetBySequenceRangeSql = """
+        SELECT entry_id, tenant_id, event_type, resource_type, resource_id, actor_id, actor_type,
+               actor_ip, user_agent, http_method, request_path, old_state, new_state, description,
+               correlation_id, previous_entry_hash, content_hash, sequence_number, occurred_at, metadata
+          FROM audit_entries
+         WHERE tenant_id = @tenant_id AND sequence_number >= @start_seq AND sequence_number <= @end_seq
+         ORDER BY sequence_number ASC
+        """;
+
+    private const string GetByResourceSql = """
+        SELECT entry_id, tenant_id, event_type, resource_type, resource_id, actor_id, actor_type,
+               actor_ip, user_agent, http_method, request_path, old_state, new_state, description,
+               correlation_id, previous_entry_hash, content_hash, sequence_number, occurred_at, metadata
+          FROM audit_entries
+         WHERE tenant_id = @tenant_id AND resource_type = @resource_type AND resource_id = @resource_id
+         ORDER BY occurred_at DESC
+         LIMIT @limit
+        """;
+
+    private const string GetCountSql = """
+        SELECT COUNT(*)
+          FROM audit_entries
+         WHERE tenant_id = @tenant_id
+        """;
+
+    private readonly ReleaseOrchestratorDataSource _dataSource;
+    private readonly CanonicalJsonHasher _hasher;
+    private readonly ILogger<PostgresAuditRepository> _logger;
+    private readonly TimeProvider _timeProvider;
+
+    public PostgresAuditRepository(
+        ReleaseOrchestratorDataSource dataSource,
+        CanonicalJsonHasher hasher,
+        ILogger<PostgresAuditRepository> logger,
+        TimeProvider? timeProvider = null)
+    {
+        _dataSource = dataSource ?? throw new ArgumentNullException(nameof(dataSource));
+        _hasher = hasher ?? throw new ArgumentNullException(nameof(hasher));
+        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+        _timeProvider = timeProvider ?? TimeProvider.System;
+    }
+
+    public async Task<AuditEntry> AppendAsync(
+        string tenantId,
+        AuditEventType eventType,
+        string resourceType,
+        Guid resourceId,
+        string actorId,
+        ActorType actorType,
+        string description,
+        string? oldState = null,
+        string? newState = null,
+        string? actorIp = null,
+        string? userAgent = null,
+        string? httpMethod = null,
+        string? requestPath = null,
+        string? correlationId = null,
+        string? metadata = null,
+        CancellationToken cancellationToken = default)
+    {
+        await using var connection = await _dataSource.OpenConnectionAsync(tenantId, "writer", cancellationToken).ConfigureAwait(false);
+        await using var transaction = await connection.BeginTransactionAsync(cancellationToken).ConfigureAwait(false);
+
+        try
+        {
+            // Get next sequence number and previous hash
+            long sequenceNumber;
+            string? previousEntryHash;
+
+            await using (var seqCommand = new NpgsqlCommand(GetSequenceSql, connection, transaction))
+            {
+                seqCommand.CommandTimeout = _dataSource.CommandTimeoutSeconds;
+                seqCommand.Parameters.AddWithValue("tenant_id", tenantId);
+
+                await using var reader = await seqCommand.ExecuteReaderAsync(cancellationToken).ConfigureAwait(false);
+                if (!await reader.ReadAsync(cancellationToken).ConfigureAwait(false))
+                {
+                    throw new InvalidOperationException("Failed to get next audit sequence.");
+                }
+
+                sequenceNumber = reader.GetInt64(0);
+                previousEntryHash = reader.IsDBNull(1) ? null : reader.GetString(1);
+            }
+
+            // Create the entry
+            var occurredAt = _timeProvider.GetUtcNow();
+            var entry = AuditEntry.Create(
+                hasher: _hasher,
+                tenantId: tenantId,
+                eventType: eventType,
+                resourceType: resourceType,
+                resourceId: resourceId,
+                actorId: actorId,
+                actorType: actorType,
+                description: description,
+                occurredAt: occurredAt,
+                oldState: oldState,
+                newState: newState,
+                actorIp: actorIp,
+                userAgent: userAgent,
+                httpMethod: httpMethod,
+                requestPath: requestPath,
+                correlationId: correlationId,
+                previousEntryHash: previousEntryHash,
+                sequenceNumber: sequenceNumber,
+                metadata: metadata);
+
+            // Insert the entry
+            await using (var insertCommand = new NpgsqlCommand(InsertEntrySql, connection, transaction))
+            {
+                insertCommand.CommandTimeout = _dataSource.CommandTimeoutSeconds;
+                AddEntryParameters(insertCommand, entry);
+                await insertCommand.ExecuteNonQueryAsync(cancellationToken).ConfigureAwait(false);
+            }
+
+            // Update sequence hash
+            await using (var updateCommand = new NpgsqlCommand(UpdateSequenceHashSql, connection, transaction))
+            {
+                updateCommand.CommandTimeout = _dataSource.CommandTimeoutSeconds;
+                updateCommand.Parameters.AddWithValue("tenant_id", tenantId);
+                updateCommand.Parameters.AddWithValue("content_hash", entry.ContentHash);
+                await updateCommand.ExecuteNonQueryAsync(cancellationToken).ConfigureAwait(false);
+            }
+
+            await transaction.CommitAsync(cancellationToken).ConfigureAwait(false);
+
+            _logger.LogDebug("Audit entry {EntryId} appended for tenant {TenantId}, sequence {Sequence}",
+                entry.EntryId, tenantId, sequenceNumber);
+
+            return entry;
+        }
+        catch
+        {
+            await transaction.RollbackAsync(cancellationToken).ConfigureAwait(false);
+            throw;
+        }
+    }
+
+    public async Task<AuditEntry?> GetByIdAsync(
+        string tenantId,
+        Guid entryId,
+        CancellationToken cancellationToken = default)
+    {
+        await using var connection = await _dataSource.OpenConnectionAsync(tenantId, "reader", cancellationToken).ConfigureAwait(false);
+        await using var command = new NpgsqlCommand(GetByIdSql, connection);
+        command.CommandTimeout = _dataSource.CommandTimeoutSeconds;
+        command.Parameters.AddWithValue("tenant_id", tenantId);
+        command.Parameters.AddWithValue("entry_id", entryId);
+
+        await using var reader = await command.ExecuteReaderAsync(cancellationToken).ConfigureAwait(false);
+        return await reader.ReadAsync(cancellationToken).ConfigureAwait(false)
+            ? ReadEntry(reader)
+            : null;
+    }
+
+    public async Task<IReadOnlyList<AuditEntry>> ListAsync(
+        string tenantId,
+        AuditEventType? eventType = null,
+        string? resourceType = null,
+        Guid? resourceId = null,
+        string? actorId = null,
+        DateTimeOffset? startTime = null,
+        DateTimeOffset? endTime = null,
+        int limit = 100,
+        int offset = 0,
+        CancellationToken cancellationToken = default)
+    {
+        await using var connection = await _dataSource.OpenConnectionAsync(tenantId, "reader", cancellationToken).ConfigureAwait(false);
+
+        var sql = ListSql;
+        var conditions = new List<string>();
+        var parameters = new List<NpgsqlParameter> { new("tenant_id", tenantId) };
+
+        if (eventType.HasValue)
+        {
+            conditions.Add("event_type = @event_type");
+            parameters.Add(new NpgsqlParameter("event_type", (int)eventType.Value));
+        }
+
+        if (resourceType is not null)
+        {
+            conditions.Add("resource_type = @resource_type");
+            parameters.Add(new NpgsqlParameter("resource_type", resourceType));
+        }
+
+        if (resourceId.HasValue)
+        {
+            conditions.Add("resource_id = @resource_id");
+            parameters.Add(new NpgsqlParameter("resource_id", resourceId.Value));
+        }
+
+        if (actorId is not null)
+        {
+            conditions.Add("actor_id = @actor_id");
+            parameters.Add(new NpgsqlParameter("actor_id", actorId));
+        }
+
+        if (startTime.HasValue)
+        {
+            conditions.Add("occurred_at >= @start_time");
+            parameters.Add(new NpgsqlParameter("start_time", startTime.Value));
+        }
+
+        if (endTime.HasValue)
+        {
+            conditions.Add("occurred_at <= @end_time");
+            parameters.Add(new NpgsqlParameter("end_time", endTime.Value));
+        }
+
+        if (conditions.Count > 0)
+        {
+            sql += " AND " + string.Join(" AND ", conditions);
+        }
+
+        sql += " ORDER BY occurred_at DESC OFFSET @offset LIMIT @limit";
+        parameters.Add(new NpgsqlParameter("offset", offset));
+        parameters.Add(new NpgsqlParameter("limit", limit));
+
+        await using var command = new NpgsqlCommand(sql, connection);
+        command.CommandTimeout = _dataSource.CommandTimeoutSeconds;
+        command.Parameters.AddRange(parameters.ToArray());
+
+        await using var reader = await command.ExecuteReaderAsync(cancellationToken).ConfigureAwait(false);
+        var entries = new List<AuditEntry>();
+        while (await reader.ReadAsync(cancellationToken).ConfigureAwait(false))
+        {
+            entries.Add(ReadEntry(reader));
+        }
+
+        return entries;
+    }
+
+    public async Task<IReadOnlyList<AuditEntry>> GetBySequenceRangeAsync(
+        string tenantId,
+        long startSequence,
+        long endSequence,
+        CancellationToken cancellationToken = default)
+    {
+        await using var connection = await _dataSource.OpenConnectionAsync(tenantId, "reader", cancellationToken).ConfigureAwait(false);
+        await using var command = new NpgsqlCommand(GetBySequenceRangeSql, connection);
+        command.CommandTimeout = _dataSource.CommandTimeoutSeconds;
+        command.Parameters.AddWithValue("tenant_id", tenantId);
+        command.Parameters.AddWithValue("start_seq", startSequence);
+        command.Parameters.AddWithValue("end_seq", endSequence);
+
+        await using var reader = await command.ExecuteReaderAsync(cancellationToken).ConfigureAwait(false);
+        var entries = new List<AuditEntry>();
+        while (await reader.ReadAsync(cancellationToken).ConfigureAwait(false))
+        {
+            entries.Add(ReadEntry(reader));
+        }
+
+        return entries;
+    }
+
+    public async Task<AuditEntry?> GetLatestAsync(
+        string tenantId,
+        CancellationToken cancellationToken = default)
+    {
+        await using var connection = await _dataSource.OpenConnectionAsync(tenantId, "reader", cancellationToken).ConfigureAwait(false);
+        await using var command = new NpgsqlCommand(GetLatestSql, connection);
+        command.CommandTimeout = _dataSource.CommandTimeoutSeconds;
+        command.Parameters.AddWithValue("tenant_id", tenantId);
+
+        await using var reader = await command.ExecuteReaderAsync(cancellationToken).ConfigureAwait(false);
+        return await reader.ReadAsync(cancellationToken).ConfigureAwait(false)
+            ? ReadEntry(reader)
+            : null;
+    }
+
+    public async Task<IReadOnlyList<AuditEntry>> GetByResourceAsync(
+        string tenantId,
+        string resourceType,
+        Guid resourceId,
+        int limit = 100,
+        CancellationToken cancellationToken = default)
+    {
+        await using var connection = await _dataSource.OpenConnectionAsync(tenantId, "reader", cancellationToken).ConfigureAwait(false);
+        await using var command = new NpgsqlCommand(GetByResourceSql, connection);
+        command.CommandTimeout = _dataSource.CommandTimeoutSeconds;
+        command.Parameters.AddWithValue("tenant_id", tenantId);
+        command.Parameters.AddWithValue("resource_type", resourceType);
+        command.Parameters.AddWithValue("resource_id", resourceId);
+        command.Parameters.AddWithValue("limit", limit);
+
+        await using var reader = await command.ExecuteReaderAsync(cancellationToken).ConfigureAwait(false);
+        var entries = new List<AuditEntry>();
+        while (await reader.ReadAsync(cancellationToken).ConfigureAwait(false))
+        {
+            entries.Add(ReadEntry(reader));
+        }
+
+        return entries;
+    }
+
+    public async Task<long> GetCountAsync(
+        string tenantId,
+        AuditEventType? eventType = null,
+        DateTimeOffset? startTime = null,
+        DateTimeOffset? endTime = null,
+        CancellationToken cancellationToken = default)
+    {
+        await using var connection = await _dataSource.OpenConnectionAsync(tenantId, "reader", cancellationToken).ConfigureAwait(false);
+
+        var sql = GetCountSql;
+        var conditions = new List<string>();
+        var parameters = new List<NpgsqlParameter> { new("tenant_id", tenantId) };
+
+        if (eventType.HasValue)
+        {
+            conditions.Add("event_type = @event_type");
+            parameters.Add(new NpgsqlParameter("event_type", (int)eventType.Value));
+        }
+
+        if (startTime.HasValue)
+        {
+            conditions.Add("occurred_at >= @start_time");
+            parameters.Add(new NpgsqlParameter("start_time", startTime.Value));
+        }
+
+        if (endTime.HasValue)
+        {
+            conditions.Add("occurred_at <= @end_time");
+            parameters.Add(new NpgsqlParameter("end_time", endTime.Value));
+        }
+
+        if (conditions.Count > 0)
+        {
+            sql += " AND " + string.Join(" AND ", conditions);
+        }
+
+        await using var command = new NpgsqlCommand(sql, connection);
+        command.CommandTimeout = _dataSource.CommandTimeoutSeconds;
+        command.Parameters.AddRange(parameters.ToArray());
+
+        var result = await command.ExecuteScalarAsync(cancellationToken).ConfigureAwait(false);
+        return result is long count ? count : 0;
+    }
+
+    public async Task<ChainVerificationResult> VerifyChainAsync(
+        string tenantId,
+        long? startSequence = null,
+        long? endSequence = null,
+        CancellationToken cancellationToken = default)
+    {
+        await using var connection = await _dataSource.OpenConnectionAsync(tenantId, "reader", cancellationToken).ConfigureAwait(false);
+        await using var command = new NpgsqlCommand(VerifyChainSql, connection);
+        command.CommandTimeout = _dataSource.CommandTimeoutSeconds;
+        command.Parameters.AddWithValue("tenant_id", tenantId);
+        command.Parameters.AddWithValue("start_seq", (object?)startSequence ?? 1L);
+        command.Parameters.AddWithValue("end_seq", (object?)endSequence ?? DBNull.Value);
+
+        await using var reader = await command.ExecuteReaderAsync(cancellationToken).ConfigureAwait(false);
+        if (!await reader.ReadAsync(cancellationToken).ConfigureAwait(false))
+        {
+            return new ChainVerificationResult(true, null, null, null);
+        }
+
+        return new ChainVerificationResult(
+            IsValid: reader.GetBoolean(0),
+            InvalidEntryId: reader.IsDBNull(1) ? null : reader.GetGuid(1),
+            InvalidSequence: reader.IsDBNull(2) ? null : reader.GetInt64(2),
+            ErrorMessage: reader.IsDBNull(3) ? null : reader.GetString(3));
+    }
+
+    public async Task<AuditSummary> GetSummaryAsync(
+        string tenantId,
+        DateTimeOffset? since = null,
+        CancellationToken cancellationToken = default)
+    {
+        await using var connection = await _dataSource.OpenConnectionAsync(tenantId, "reader", cancellationToken).ConfigureAwait(false);
+        await using var command = new NpgsqlCommand(GetSummarySql, connection);
+        command.CommandTimeout = _dataSource.CommandTimeoutSeconds;
+        command.Parameters.AddWithValue("tenant_id", tenantId);
+        command.Parameters.AddWithValue("since", (object?)since ?? DBNull.Value);
+
+        await using var reader = await command.ExecuteReaderAsync(cancellationToken).ConfigureAwait(false);
+        if (!await reader.ReadAsync(cancellationToken).ConfigureAwait(false))
+        {
+            return new AuditSummary(0, 0, 0, 0, 0, null, null);
+        }
+
+        return new AuditSummary(
+            TotalEntries: reader.GetInt64(0),
+            EntriesSince: reader.GetInt64(1),
+            EventTypes: reader.GetInt64(2),
+            UniqueActors: reader.GetInt64(3),
+            UniqueResources: reader.GetInt64(4),
+            EarliestEntry: reader.IsDBNull(5) ? null : reader.GetFieldValue<DateTimeOffset>(5),
+            LatestEntry: reader.IsDBNull(6) ? null : reader.GetFieldValue<DateTimeOffset>(6));
+    }
+
+    private static void AddEntryParameters(NpgsqlCommand command, AuditEntry entry)
+    {
+        command.Parameters.AddWithValue("entry_id", entry.EntryId);
+        command.Parameters.AddWithValue("tenant_id", entry.TenantId);
+        command.Parameters.AddWithValue("event_type", (int)entry.EventType);
+        command.Parameters.AddWithValue("resource_type", entry.ResourceType);
+        command.Parameters.AddWithValue("resource_id", entry.ResourceId);
+        command.Parameters.AddWithValue("actor_id", entry.ActorId);
+        command.Parameters.AddWithValue("actor_type", (int)entry.ActorType);
+        command.Parameters.AddWithValue("actor_ip", (object?)entry.ActorIp ?? DBNull.Value);
+        command.Parameters.AddWithValue("user_agent", (object?)entry.UserAgent ?? DBNull.Value);
+        command.Parameters.AddWithValue("http_method", (object?)entry.HttpMethod ?? DBNull.Value);
+        command.Parameters.AddWithValue("request_path", (object?)entry.RequestPath ?? DBNull.Value);
+        command.Parameters.AddWithValue("old_state", (object?)entry.OldState ?? DBNull.Value);
+        command.Parameters.AddWithValue("new_state", (object?)entry.NewState ?? DBNull.Value);
+        command.Parameters.AddWithValue("description", entry.Description);
+        command.Parameters.AddWithValue("correlation_id", (object?)entry.CorrelationId ?? DBNull.Value);
+        command.Parameters.AddWithValue("previous_entry_hash", (object?)entry.PreviousEntryHash ?? DBNull.Value);
+        command.Parameters.AddWithValue("content_hash", entry.ContentHash);
+        command.Parameters.AddWithValue("sequence_number", entry.SequenceNumber);
+        command.Parameters.AddWithValue("occurred_at", entry.OccurredAt);
+        command.Parameters.AddWithValue("metadata", (object?)entry.Metadata ?? DBNull.Value);
+    }
+
+    private static AuditEntry ReadEntry(NpgsqlDataReader reader) => new(
+        EntryId: reader.GetGuid(0),
+        TenantId: reader.GetString(1),
+        EventType: (AuditEventType)reader.GetInt32(2),
+        ResourceType: reader.GetString(3),
+        ResourceId: reader.GetGuid(4),
+        ActorId: reader.GetString(5),
+        ActorType: (ActorType)reader.GetInt32(6),
+        ActorIp: reader.IsDBNull(7) ? null : reader.GetString(7),
+        UserAgent: reader.IsDBNull(8) ? null : reader.GetString(8),
+        HttpMethod: reader.IsDBNull(9) ? null : reader.GetString(9),
+        RequestPath: reader.IsDBNull(10) ? null : reader.GetString(10),
+        OldState: reader.IsDBNull(11) ? null : reader.GetString(11),
+        NewState: reader.IsDBNull(12) ? null : reader.GetString(12),
+        Description: reader.GetString(13),
+        CorrelationId: reader.IsDBNull(14) ? null : reader.GetString(14),
+        PreviousEntryHash: reader.IsDBNull(15) ? null : reader.GetString(15),
+        ContentHash: reader.GetString(16),
+        SequenceNumber: reader.GetInt64(17),
+        OccurredAt: reader.GetFieldValue<DateTimeOffset>(18),
+        Metadata: reader.IsDBNull(19) ? null : reader.GetString(19));
+}