Refactor DownloadManager and LoraFileHandler for improved file monitoring

- Simplified the path handling in DownloadManager by directly adding normalized paths to the ignore list.
- Updated LoraFileHandler to utilize a set for ignore paths, enhancing performance and clarity.
- Implemented debouncing for modified file events to prevent duplicate processing and improve efficiency.
- Enhanced the handling of file creation, modification, and deletion events for .safetensors files, ensuring accurate processing and logging.
- Adjusted cache operations to streamline the addition and removal of files based on real paths.

py/services/download_manager.py

@@ -75,17 +75,10 @@ class DownloadManager:
             file_size = file_info.get('sizeKB', 0) * 1024
 
             # 4. 通知文件监控系统 - 使用规范化路径和文件大小
-            if self.file_monitor and self.file_monitor.handler:
-                # Add both the normalized path and potential alternative paths
-                normalized_path = save_path.replace(os.sep, '/')
-                self.file_monitor.handler.add_ignore_path(normalized_path, file_size)
-                
-                # Also add the path with file extension variations (.safetensors)
-                if not normalized_path.endswith('.safetensors'):
-                    safetensors_path = os.path.splitext(normalized_path)[0] + '.safetensors'
-                    self.file_monitor.handler.add_ignore_path(safetensors_path, file_size)
-                
-                logger.debug(f"Added download path to ignore list: {normalized_path} (size: {file_size} bytes)")
+            self.file_monitor.handler.add_ignore_path(
+                 save_path.replace(os.sep, '/'),
+                 file_size
+            )
 
             # 5. 准备元数据
             metadata = LoraMetadata.from_civitai_info(version_info, file_info, save_path)