fix: address reviewer bugs — metadata mutation, test args, embedding dict, output_format

1. Fix _create_procedural_memory metadata mutation: use spread operator
   instead of in-place dict assignment (sync + async)
2. Fix test_add assertion: remove trailing None arg that doesn't match
   _add_to_vector_store(messages, metadata, filters, infer) signature
3. Restore output_format: "v1.1" in TS client search payload as fallback
4. Fix infer=False path: pass {text: embedding} dict to _create_memory
   instead of raw embedding list to avoid redundant embed() calls (sync + async)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/test_main.py

@@ -86,7 +86,7 @@ def test_add(memory_instance, version, enable_graph):
         assert result["results"] == [{"memory": "Test memory", "event": "ADD"}]
 
     memory_instance._add_to_vector_store.assert_called_once_with(
-        [{"role": "user", "content": "Test message"}], {"user_id": "test_user"}, {"user_id": "test_user"}, True, None
+        [{"role": "user", "content": "Test message"}], {"user_id": "test_user"}, {"user_id": "test_user"}, True
     )
 
     # Remove the conditional assertion for _add_to_graph