refactor: use shared manager from main process for storage implementations.

lightrag/kg/json_kv_impl.py

@@ -3,7 +3,6 @@ import os
 from dataclasses import dataclass
 from typing import Any, final
 import threading
-from multiprocessing import Manager
 
 from lightrag.base import (
     BaseKVStorage,
@@ -13,6 +12,7 @@ from lightrag.utils import (
     logger,
     write_json,
 )
+from lightrag.api.utils_api import manager as main_process_manager
 
 # Global variables for shared memory management
 _init_lock = threading.Lock()
@@ -26,7 +26,7 @@ def _get_manager():
     with _init_lock:
         if _manager is None:
             try:
-                _manager = Manager()
+                _manager = main_process_manager
                 _shared_kv_data = _manager.dict()
             except Exception as e:
                 logger.error(f"Failed to initialize shared memory manager: {e}")