fix(backend): watch times stay in utc for naive telegram dates, webhook outbox survives a database hiccup at start

backend/src/userbot/modules/watches/cache.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from datetime import datetime, timedelta
+from datetime import UTC, datetime, timedelta
 from typing import TYPE_CHECKING, Any
 
 from userbot.modules.watches import repository
@@ -159,7 +159,7 @@ class WatchCache:
         if not watch_ids:
             return
         if status != "online":
-            self._last_seen[peer_id] = last_online or at
+            self._last_seen[peer_id] = (last_online or at).astimezone(UTC)
             return
         await self._guard(self._on_online(peer_id, at, watch_ids))