feat: automatically initialize API manager in single process mode

- Add manager init check in __post_init__
- Call initialize_manager if needed
- Add info log message for init
- Ensure API manager is ready for use

lightrag/lightrag.py

@@ -267,6 +267,12 @@ 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")
+            
         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}")