Fix: Graceful Telegram bot startup - handle network errors

app/services/telegram_bot.py

@@ -11,41 +11,52 @@ class TelegramBot:
     _instance = None
     _app: Application = None
     _bot: Bot = None
+    _started = False
     
     @classmethod
     async def start(cls):
-        """Start the Telegram bot."""
+        """Start the Telegram bot (graceful - won't crash on failure)."""
         settings = get_settings()
         
         if not settings.telegram_bot_token:
-            print("Telegram bot token not configured")
+            print("Telegram bot: Not configured (no token)")
             return
         
-        cls._bot = Bot(token=settings.telegram_bot_token)
-        cls._app = Application.builder().token(settings.telegram_bot_token).build()
-        
-        # Add handlers
-        cls._app.add_handler(CommandHandler("start", cls._handle_start))
-        cls._app.add_handler(CommandHandler("help", cls._handle_help))
-        cls._app.add_handler(CommandHandler("chatid", cls._handle_chatid))
-        cls._app.add_handler(CommandHandler("top", cls._handle_top))
-        cls._app.add_handler(CommandHandler("watchlist", cls._handle_watchlist))
-        
-        # Start polling in background
-        await cls._app.initialize()
-        await cls._app.start()
-        await cls._app.updater.start_polling(drop_pending_updates=True)
-        
-        print("Telegram bot started with polling")
+        try:
+            cls._bot = Bot(token=settings.telegram_bot_token)
+            cls._app = Application.builder().token(settings.telegram_bot_token).build()
+            
+            # Add handlers
+            cls._app.add_handler(CommandHandler("start", cls._handle_start))
+            cls._app.add_handler(CommandHandler("help", cls._handle_help))
+            cls._app.add_handler(CommandHandler("chatid", cls._handle_chatid))
+            cls._app.add_handler(CommandHandler("top", cls._handle_top))
+            cls._app.add_handler(CommandHandler("watchlist", cls._handle_watchlist))
+            
+            # Start polling in background
+            await cls._app.initialize()
+            await cls._app.start()
+            await cls._app.updater.start_polling(drop_pending_updates=True)
+            
+            cls._started = True
+            print("Telegram bot: Started with polling")
+        except Exception as e:
+            print(f"Telegram bot: Failed to start ({e.__class__.__name__})")
+            cls._app = None
+            cls._bot = None
+            cls._started = False
     
     @classmethod
     async def stop(cls):
         """Stop the Telegram bot."""
-        if cls._app:
-            await cls._app.updater.stop()
-            await cls._app.stop()
-            await cls._app.shutdown()
-            print("Telegram bot stopped")
+        if cls._app and cls._started:
+            try:
+                await cls._app.updater.stop()
+                await cls._app.stop()
+                await cls._app.shutdown()
+                print("Telegram bot: Stopped")
+            except Exception as e:
+                print(f"Telegram bot: Error stopping ({e})")
     
     @classmethod
     async def _handle_start(cls, update: Update, context: ContextTypes.DEFAULT_TYPE):