feat: 长保持连接，控制端可重启

backend/monitoring/services.py

@@ -1,5 +1,7 @@
 from __future__ import annotations
 
+import atexit
+
 from .control import ControlArbiter, NativeUdpControlIngress, OmniSocketControlSender
 from .telemetry import GpsDataService, HubTelemetryReceiver, NetworkTelemetryService
 from .video import OmniSocketVideoReceiver, VideoFrameService
@@ -22,3 +24,21 @@ network_service = NetworkTelemetryService(
     _hub_telemetry_receiver,
 )
 
+
+def shutdown_monitoring_services() -> None:
+    for closer in (
+        network_service.close,
+        native_control_ingress.close,
+        control_arbiter.close,
+        _hub_telemetry_receiver.close,
+        _video_receiver.close,
+        _control_sender.close,
+    ):
+        try:
+            closer()
+        except Exception:
+            pass
+
+
+atexit.register(shutdown_monitoring_services)
+