Refactor storage implementations to support both single and multi-process modes

• Add shared storage management module
• Support process/thread lock based on mode

lightrag/lightrag.py

@@ -266,13 +266,7 @@ class LightRAG:
 
     _storages_status: StoragesStatus = field(default=StoragesStatus.NOT_CREATED)
 
-    def __post_init__(self):
-        # Initialize manager if needed
-        from lightrag.api.utils_api import manager, initialize_manager
-        if manager is None:
-            initialize_manager()
-            logger.info("Initialized manager for single process mode")
-            
+    def __post_init__(self):            
         os.makedirs(os.path.dirname(self.log_file_path), exist_ok=True)
         set_logger(self.log_file_path, self.log_level)
         logger.info(f"Logger initialized for working directory: {self.working_dir}")