Resource subscribe should be true if handler provided

src/ModelContextProtocol.Core/Server/McpServer.cs

@@ -308,8 +308,7 @@ await originalListResourceTemplatesHandler(request, cancellationToken).Configure
 
             listChanged = true;
 
-            // TODO: Implement subscribe/unsubscribe logic for resource and resource template collections.
-            // subscribe = true;
+            subscribe = true;
         }
 
         ServerCapabilities.Resources.ListResourcesHandler = listResourcesHandler;