Fix build and code structure improvements. New but essential UI functionality. CI improvements. Documentation improvements. AI module improvements.

src/Policy/__Libraries/StellaOps.Policy/Snapshots/SnapshotService.cs

@@ -275,4 +275,15 @@ public sealed class InMemorySnapshotStore : ISnapshotStore
         // In-memory implementation doesn't support digest-based lookup
         return Task.FromResult<byte[]?>(null);
     }
+
+    /// <summary>
+    /// Clears all snapshots from the store (for testing only).
+    /// </summary>
+    public void Clear()
+    {
+        lock (_lock)
+        {
+            _snapshots.Clear();
+        }
+    }
 }