audit notes work completed, test fixes work (95% done), new sprints, new data sources setup and configuration

src/__Libraries/StellaOps.Reachability.Core.Tests/ReachabilityIndexIntegrationTests.cs

@@ -500,6 +500,23 @@ internal sealed class MockReachGraphAdapter : IReachGraphAdapter
         });
     }
 
+    public Task<bool> HasGraphAsync(string artifactDigest, CancellationToken ct)
+    {
+        ct.ThrowIfCancellationRequested();
+        return Task.FromResult(true);
+    }
+
+    public Task<ReachGraphMetadata?> GetMetadataAsync(string artifactDigest, CancellationToken ct)
+    {
+        ct.ThrowIfCancellationRequested();
+        return Task.FromResult<ReachGraphMetadata?>(new ReachGraphMetadata
+        {
+            ArtifactDigest = artifactDigest,
+            GeneratedAt = _timeProvider.GetUtcNow(),
+            SymbolCount = 100
+        });
+    }
+
     private static string MakeKey(SymbolRef symbol, string artifactDigest)
         => $"{symbol.Purl}:{symbol.Symbol}:{artifactDigest}";
 }
@@ -569,6 +586,24 @@ internal sealed class MockSignalsAdapter : ISignalsAdapter
         });
     }
 
+    public Task<bool> HasFactsAsync(string artifactDigest, string? tenantId, CancellationToken ct)
+    {
+        ct.ThrowIfCancellationRequested();
+        return Task.FromResult(true);
+    }
+
+    public Task<SignalsMetadata?> GetMetadataAsync(string artifactDigest, string? tenantId, CancellationToken ct)
+    {
+        ct.ThrowIfCancellationRequested();
+        return Task.FromResult<SignalsMetadata?>(new SignalsMetadata
+        {
+            ArtifactDigest = artifactDigest,
+            FirstObservation = _timeProvider.GetUtcNow().AddDays(-30),
+            LastObservation = _timeProvider.GetUtcNow(),
+            TotalObservations = 1000
+        });
+    }
+
     private static string MakeKey(SymbolRef symbol, string artifactDigest)
         => $"{symbol.Purl}:{symbol.Symbol}:{artifactDigest}";
 }