Fix: detect dead WebSocket connection and trigger reconnection

live_candle_fetcher.py

@@ -164,6 +164,8 @@ class LiveCandleFetcher:
             while True:
                 try:
                     time.sleep(1)
+                    if not self.info.ws_manager.is_alive():
+                        raise ConnectionError("WebSocket connection is not alive")
                     if time.time() - self._last_status_log >= 300:
                         if self._last_candle_info:
                             logging.info(f"LiveCandleFetcher running correctly. Last 1m candle collected: {self._last_candle_info[0]} at {self._last_candle_info[1]}")