feat(workflow): enhance workflow execution and context management

app/workflow/actions/scrape_file.py

@@ -61,18 +61,18 @@ class ScrapeFileAction(BaseAction):
                 logger.info(f"{fileitem.path} 已刮削过，跳过")
                 continue
             mediachain = MediaChain()
-            context = mediachain.recognize_by_path(
+            media_context = mediachain.recognize_by_path(
                 fileitem.path,
                 obtain_images=True,
             )
-            if not context or not context.media_info:
+            if not media_context or not media_context.media_info:
                 _failed_count += 1
                 logger.info(f"{fileitem.path} 未识别到媒体信息，无法刮削")
                 continue
             mediachain.scrape_metadata(
                 fileitem=fileitem,
-                meta=context.meta_info,
-                mediainfo=context.media_info
+                meta=media_context.meta_info,
+                mediainfo=media_context.media_info
             )
             self._scraped_files.append(fileitem)
             # 保存缓存