wip: doctor/cli/docs/api to vector db consolidation; api hardening for descriptions, tenant, and scopes; migrations and conversions of all DALs to EF v10

src/__Libraries/StellaOps.ReachGraph.Persistence/PostgresReachGraphRepository.Delete.cs

@@ -1,6 +1,7 @@
 // Licensed to StellaOps under the BUSL-1.1 license.
-using Dapper;
+using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Logging;
+using StellaOps.ReachGraph.Persistence.Postgres;
 
 namespace StellaOps.ReachGraph.Persistence;
 
@@ -16,24 +17,16 @@ public sealed partial class PostgresReachGraphRepository
         ArgumentException.ThrowIfNullOrEmpty(tenantId);
 
         await using var connection = await _dataSource
-            .OpenConnectionAsync(cancellationToken)
+            .OpenConnectionAsync(tenantId, "writer", cancellationToken)
             .ConfigureAwait(false);
-        await SetTenantContextAsync(connection, tenantId, cancellationToken).ConfigureAwait(false);
+        await using var dbContext = ReachGraphDbContextFactory.Create(connection, CommandTimeoutSeconds, GetSchemaName());
 
-        const string sql = """
-            DELETE FROM reachgraph.subgraphs
-            WHERE digest = @Digest
-              AND tenant_id = @TenantId
-            RETURNING digest
-            """;
+        var affected = await dbContext.Subgraphs
+            .Where(s => s.Digest == digest && s.TenantId == tenantId)
+            .ExecuteDeleteAsync(cancellationToken)
+            .ConfigureAwait(false);
 
-        var command = new CommandDefinition(
-            sql,
-            new { Digest = digest, TenantId = tenantId },
-            cancellationToken: cancellationToken);
-        var deleted = await connection.QuerySingleOrDefaultAsync<string>(command).ConfigureAwait(false);
-
-        if (deleted is not null)
+        if (affected > 0)
         {
             _logger.LogInformation("Deleted reachability graph {Digest}", digest);
             return true;