fix(telegram): add shutdown guard to avoid duplicate restarts

Add a `_shutting_down` flag to `TelegramClient` to suppress disconnect handling during intentional shutdown. The flag is set before sending SIGTERM in `_restart_app` and checked in `_on_disconnect` to ignore those events. Minor formatting adjustments were also applied to `api_server.py` (try block and `uvicorn.run` arguments).

api_server.py

@@ -121,12 +121,11 @@ if __name__ == "__main__":
     # Log uvloop status
     logger.info("    uvloop: enabled (asyncio speedup active)")
     
-    try:        
+    try:
         uvicorn.run(
-            "api_server:app", 
-            host=Config["api_host"], 
-            port=Config["api_port"], 
-            reload=True,
+            "api_server:app",
+            host=Config["api_host"],
+            port=Config["api_port"],
             loop="uvloop"
         )
     except OSError as e:

telegram_client.py

@@ -35,6 +35,7 @@ class TelegramClient:
         )
         self.disconnect_count = 0
         self.max_disconnects = 3
+        self._shutting_down = False  # Guard to prevent re-triggering restart during shutdown
         self._setup_connection_handlers()
 
     def _ensure_session_directory(self):
@@ -52,6 +53,10 @@ class TelegramClient:
 
     async def _on_disconnect(self, _client, _session=None):
         """Handles disconnection from Telegram servers"""
+        # Ignore disconnects that are caused by the intentional shutdown sequence
+        if self._shutting_down:
+            logger.debug("connection_handler: ignoring disconnect event during shutdown")
+            return
         self.disconnect_count += 1
         logger.warning(f"connection_handler: connection lost (#{self.disconnect_count})")
         
@@ -73,6 +78,7 @@ class TelegramClient:
 
     def _restart_app(self):
         """Restarts the application by sending SIGTERM to the process"""
+        self._shutting_down = True  # Set flag before sending signal to suppress subsequent disconnect events
         logger.warning("connection_handler: restarting application by sending SIGTERM")
         try:
             # Use SIGTERM for proper Docker container restart