Implement TimeProvider injection for deterministic timestamps across various services and modules

src/__Libraries/StellaOps.Facet/FacetDriftVexWorkflow.cs

@@ -55,6 +55,7 @@ public sealed class FacetDriftVexWorkflow
     private readonly FacetDriftVexEmitter _emitter;
     private readonly IFacetDriftVexDraftStore _draftStore;
     private readonly ILogger<FacetDriftVexWorkflow> _logger;
+    private readonly TimeProvider _timeProvider;
 
     /// <summary>
     /// Initializes a new instance of the <see cref="FacetDriftVexWorkflow"/> class.
@@ -62,11 +63,13 @@ public sealed class FacetDriftVexWorkflow
     public FacetDriftVexWorkflow(
         FacetDriftVexEmitter emitter,
         IFacetDriftVexDraftStore draftStore,
-        ILogger<FacetDriftVexWorkflow>? logger = null)
+        ILogger<FacetDriftVexWorkflow>? logger = null,
+        TimeProvider? timeProvider = null)
     {
         _emitter = emitter ?? throw new ArgumentNullException(nameof(emitter));
         _draftStore = draftStore ?? throw new ArgumentNullException(nameof(draftStore));
         _logger = logger ?? NullLogger<FacetDriftVexWorkflow>.Instance;
+        _timeProvider = timeProvider ?? TimeProvider.System;
     }
 
     /// <summary>
@@ -261,6 +264,6 @@ public sealed class FacetDriftVexWorkflow
     /// </summary>
     public Task<ImmutableArray<FacetDriftVexDraft>> GetOverdueDraftsAsync(CancellationToken ct = default)
     {
-        return _draftStore.GetOverdueAsync(DateTimeOffset.UtcNow, ct);
+        return _draftStore.GetOverdueAsync(_timeProvider.GetUtcNow(), ct);
     }
 }