save progress

src/VexLens/StellaOps.VexLens/Export/IConsensusExportService.cs

@@ -1,4 +1,5 @@
 using System.Text.Json;
+using StellaOps.Determinism;
 using StellaOps.VexLens.Consensus;
 using StellaOps.VexLens.Models;
 using StellaOps.VexLens.Storage;
@@ -273,12 +274,19 @@ public enum ExportFormat
 public sealed class ConsensusExportService : IConsensusExportService
 {
     private readonly IConsensusProjectionStore _projectionStore;
+    private readonly TimeProvider _timeProvider;
+    private readonly IGuidProvider _guidProvider;
 
     private const string SnapshotVersion = "1.0.0";
 
-    public ConsensusExportService(IConsensusProjectionStore projectionStore)
+    public ConsensusExportService(
+        IConsensusProjectionStore projectionStore,
+        TimeProvider? timeProvider = null,
+        IGuidProvider? guidProvider = null)
     {
         _projectionStore = projectionStore;
+        _timeProvider = timeProvider ?? TimeProvider.System;
+        _guidProvider = guidProvider ?? new SystemGuidProvider();
     }
 
     public async Task<ConsensusSnapshot> CreateSnapshotAsync(
@@ -338,12 +346,12 @@ public sealed class ConsensusExportService : IConsensusExportService
             .GroupBy(p => p.Status)
             .ToDictionary(g => g.Key, g => g.Count());
 
-        var snapshotId = $"snap-{Guid.NewGuid():N}";
+        var snapshotId = $"snap-{_guidProvider.NewGuid():N}";
         var contentHash = ComputeContentHash(projections);
 
         return new ConsensusSnapshot(
             SnapshotId: snapshotId,
-            CreatedAt: DateTimeOffset.UtcNow,
+            CreatedAt: _timeProvider.GetUtcNow(),
             Version: SnapshotVersion,
             TenantId: request.TenantId,
             Projections: projections,
@@ -400,13 +408,13 @@ public sealed class ConsensusExportService : IConsensusExportService
 
         // For a true incremental, we'd compare with the previous snapshot
         // Here we just return new/updated since the timestamp
-        var snapshotId = $"snap-inc-{Guid.NewGuid():N}";
+        var snapshotId = $"snap-inc-{_guidProvider.NewGuid():N}";
         var contentHash = ComputeContentHash(current.Projections);
 
         return new IncrementalSnapshot(
             SnapshotId: snapshotId,
             PreviousSnapshotId: lastSnapshotId,
-            CreatedAt: DateTimeOffset.UtcNow,
+            CreatedAt: _timeProvider.GetUtcNow(),
             Version: SnapshotVersion,
             Added: current.Projections,
             Removed: [], // Would need previous snapshot to determine removed