Fix client test mock to match new method signature

Update test assertion to match the expanded get_working_memory method signature that includes user_id, model_name, and context_window_max parameters.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: abrookins

agent-memory-client/tests/test_client.py

@@ -88,7 +88,13 @@ async def test_promote_working_memories_to_long_term(self, enhanced_test_client)
             )
 
             assert result.status == "ok"
-            mock_get.assert_called_once_with(session_id=session_id, namespace=None)
+            mock_get.assert_called_once_with(
+                session_id=session_id,
+                user_id=None,
+                namespace=None,
+                model_name=None,
+                context_window_max=None,
+            )
             mock_create.assert_called_once_with(memories)
 
     @pytest.mark.asyncio