add proxy for tg and fix auth

utils/telegram.py

@@ -1,5 +1,6 @@
 """Telegram message utilities."""
 
+import asyncio
 import logging
 import os
 from typing import Optional
@@ -69,7 +70,7 @@ async def send_visit_result(
         )
         
         screenshot_path = result.get('screenshot_path')
-        if screenshot_path and os.path.exists(screenshot_path):
+        if screenshot_path and await asyncio.to_thread(os.path.exists, screenshot_path):
             photo = FSInputFile(screenshot_path)
             await bot.send_photo(chat_id=chat_id, photo=photo, caption=text)
         else: