perf(*): bound list queries, batch fetches, harden media downloads

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

@@ -1,5 +1,5 @@
 from pyrogram import Client
-from pyrogram.errors import PeerIdInvalid
+from pyrogram.errors import FloodPremiumWait, FloodWait, PeerIdInvalid
 from pyrogram.types import Message
 
 from userbot.modules.capture import capture_message
@@ -11,6 +11,7 @@ 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.logging import logger
 from utils.policy.models import CaptureToggles
 
 SAVE_EVERY = 100
@@ -61,21 +62,30 @@ async def backfill(ctx: JobContext) -> None:
     min_id = await resolve_min_id(ctx, chat_id)
     await ctx.save_cursor({"max_id": max_id, "min_id": min_id})
     processed = ctx.job.progress.get("processed", 0)
+    errors = ctx.job.progress.get("errors", 0)
     self_id = client.me.id if client.me else None
     try:
         async for message in client.get_chat_history(
             chat_id, max_id=max_id, min_id=min_id
         ):
-            await capture_message(client, message, capture, toggles)
-            await maybe_transcribe(client, capture, chat_id, message, self_id)
+            try:
+                await capture_message(client, message, capture, toggles)
+                await maybe_transcribe(client, capture, chat_id, message, self_id)
+            except (FloodWait, FloodPremiumWait, PeerIdInvalid):
+                raise
+            except Exception:
+                errors += 1
+                logger.exception(f"Backfill capture failed for {chat_id}/{message.id}")
             processed += 1
             if processed % SAVE_EVERY == 0:
                 next_max = message.id - 1
                 await ctx.save_cursor({"max_id": next_max, "min_id": min_id})
-                await ctx.report_progress({"processed": processed, "max_id": next_max})
+                await ctx.report_progress(
+                    {"processed": processed, "errors": errors, "max_id": next_max}
+                )
                 if await ctx.is_canceled():
                     return
     except PeerIdInvalid:
         await ctx.report_progress({"processed": processed, "error": "peer_id_invalid"})
         return
-    await ctx.report_progress({"processed": processed, "done": True})
+    await ctx.report_progress({"processed": processed, "errors": errors, "done": True})