test fixes and new product advisories work

src/Concelier/__Libraries/StellaOps.Concelier.Models/InMemoryStore/DriverStubs.cs

@@ -38,10 +38,25 @@ namespace StellaOps.Concelier.InMemoryDriver
 
     public class InMemoryClient : IStorageClient
     {
+        // Shared databases across all InMemoryClient instances for test isolation
+        private static readonly ConcurrentDictionary<string, StorageDatabase> SharedDatabases = new(StringComparer.Ordinal);
+
         public InMemoryClient(string connectionString) { }
         public InMemoryClient(InMemoryClientSettings settings) { }
-        public IStorageDatabase GetDatabase(string name, StorageDatabaseSettings? settings = null) => new StorageDatabase(name);
-        public Task DropDatabaseAsync(string name, CancellationToken cancellationToken = default) => Task.CompletedTask;
+
+        public IStorageDatabase GetDatabase(string name, StorageDatabaseSettings? settings = null)
+            => SharedDatabases.GetOrAdd(name, n => new StorageDatabase(n));
+
+        public Task DropDatabaseAsync(string name, CancellationToken cancellationToken = default)
+        {
+            SharedDatabases.TryRemove(name, out _);
+            return Task.CompletedTask;
+        }
+
+        /// <summary>
+        /// Clears all shared databases. Call this between tests to ensure isolation.
+        /// </summary>
+        public static void ResetSharedState() => SharedDatabases.Clear();
     }
 
     public class StorageDatabaseSettings { }