fix(userbot): encode absent pyrogram raw payloads as empty json

backend/src/userbot/modules/jobs/handlers/backfill_stories.py

@@ -8,6 +8,7 @@ from userbot.modules.capture.context import CaptureContext
 from userbot.modules.jobs.context import JobContext
 from userbot.modules.jobs.registry import register
 from userbot.modules.stories.service import save_story
+from utils.logging import logger
 
 SAVE_EVERY = 10
 
@@ -38,6 +39,9 @@ async def _drain(
             raise
         except RPCError:
             continue
+        except Exception:
+            logger.exception(f"Failed to save story {story.id} from {name}")
+            continue
         saved += 1
         if saved % SAVE_EVERY == 0:
             await ctx.report_progress({"saved": saved, "source": name})