Update server.py

server.py

@@ -108,8 +108,9 @@ def _get_available_retrievers_internal() -> dict:
                 "description": metadata.get("description", ""),
                 "last_updated": metadata.get("last_updated", "")
             })
-            
-    return {available}
+
+    print("### _get_available_retrievers_internal", str(available))
+    return {"retrievers": available, "count": len(available)}