Attempt re-registration if the service heartbeat could not be sent

Author: dominiquekleeven

packages/openremote_client/src/openremote_client/service_registrar.py

@@ -119,7 +119,8 @@ def _send_heartbeat(self) -> None:
             if success:
                 logger.debug(f"Heartbeat sent successfully for instance: {self.instance_id}")
             else:
-                logger.error(f"Failed to send heartbeat for instance: {self.instance_id}")
+                logger.error(f"Failed to send heartbeat for instance: {self.instance_id}, trying re-registration")
+                self._register_service()
 
         except Exception as e:
             logger.error(f"Error sending heartbeat: {e}")