lint: fix bare except and unused variables

scraper_jobs.py

@@ -41,7 +41,8 @@ class ScraperJobService:
                 )
             elif job_type == "scrape_selected":
                 await self._scrape_channels(
-                    scraper, [str(channel_id) for channel_id in payload.get("channels", [])]
+                    scraper,
+                    [str(channel_id) for channel_id in payload.get("channels", [])],
                 )
             elif job_type == "export_all":
                 await scraper.export_data()