mypy fix

Author: leshy

dimos/core/__init__.py

@@ -177,7 +177,7 @@ def close_all() -> None:
             from dimos.protocol.pubsub import shmpubsub
 
             for obj in gc.get_objects():
-                if isinstance(obj, shmpubsub.SharedMemory | shmpubsub.PickleSharedMemory):
+                if isinstance(obj, shmpubsub.SharedMemoryPubSubBase):
                     try:
                         obj.stop()
                     except Exception: