Refactor LoraFileHandler to use provided event loop and improve logging

- Updated LoraFileHandler to utilize the passed event loop for time retrieval instead of the current thread's event loop.
- Changed error logging for extension loading in mappers from error to warning level for better clarity.

py/workflow/mappers.py

@@ -421,7 +421,7 @@ def load_extensions(ext_dir: str = None) -> None:
                             logger.info(f"Loaded extension mapper: {mapper.node_type} from {filename}")
             
             except Exception as e:
-                logger.error(f"Error loading extension {filename}: {e}")
+                logger.warning(f"Error loading extension {filename}: {e}")
 
 
 # Initialize the registry with default mappers