feat: mcp and backfill fixes

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

@@ -1,8 +1,12 @@
 from pyrogram.errors import PeerIdInvalid
 
 from userbot.modules.capture import capture_message
+from userbot.modules.capture.chat_meta import meta_from_chat
 from userbot.modules.jobs.context import JobContext
 from userbot.modules.jobs.registry import register
+from userbot.modules.stt import repository as stt_repo
+from userbot.modules.stt import should_transcribe_on_backfill
+from userbot.modules.stt.gate import safe_transcribe
 from utils.policy.models import CaptureToggles
 
 SAVE_EVERY = 100
@@ -25,14 +29,24 @@ async def backfill(ctx: JobContext) -> None:
     max_id = (ctx.job.cursor or {}).get("max_id", 0)
     processed = ctx.job.progress.get("processed", 0)
     kwargs = {"max_id": max_id} if max_id else {}
+    self_id = client.me.id if client.me else None
     try:
         async for message in client.get_chat_history(chat_id, **kwargs):
             await capture_message(client, message, capture, toggles)
+            if should_transcribe_on_backfill(message, self_id) and message.chat:
+                meta = meta_from_chat(message.chat, capture.contacts.ids)
+                already = await stt_repo.is_transcribed(
+                    capture.pool, capture.account_id, chat_id, message.id
+                )
+                if capture.resolve(meta).stt and not already:
+                    await safe_transcribe(client, capture, chat_id, message.id)
             processed += 1
             if processed % SAVE_EVERY == 0:
                 next_max = message.id - 1
                 await ctx.save_cursor({"max_id": next_max})
                 await ctx.report_progress({"processed": processed, "max_id": next_max})
+                if await ctx.is_canceled():
+                    return
     except PeerIdInvalid:
         await ctx.report_progress({"processed": processed, "error": "peer_id_invalid"})
         return