feat: 把 A 端的 Session/KCP/视频/控制 都收口到一个本地 daemon 进程里，Django 和输入发送端都改成通过本机 UDS HTTP 去访问它，同时补齐了观测、性能和可用性上的几个关键问题。

backend/control/services.py

@@ -0,0 +1,51 @@
+from __future__ import annotations
+
+import sys
+from pathlib import Path
+from typing import Any
+
+
+PROJECT_ROOT = Path(__file__).resolve().parents[2]
+WORKSPACE_ROOT = PROJECT_ROOT.parent
+
+
+def _load_client_api():
+    try:
+        from omnisocket_a_side.client import OmniDaemonClient, OmniDaemonError
+    except ImportError:
+        python_dir = WORKSPACE_ROOT / "OmniSocketGo" / "python"
+        if python_dir.exists():
+            sys.path.insert(0, str(python_dir))
+        from omnisocket_a_side.client import OmniDaemonClient, OmniDaemonError
+    return OmniDaemonClient, OmniDaemonError
+
+
+_OmniDaemonClient, OmniDaemonError = _load_client_api()
+_daemon_client = _OmniDaemonClient()
+
+
+def get_daemon_client():
+    return _daemon_client
+
+
+class ControlProxyService:
+    def get_status(self) -> dict[str, Any]:
+        return get_daemon_client().get_control_status()
+
+    def send_event(
+        self,
+        *,
+        event_code: str,
+        drive_value: float = 1.0,
+        source: str = "django-api",
+        client_time_ms: int | None = None,
+    ) -> dict[str, Any]:
+        return get_daemon_client().send_control_event(
+            source=source,
+            event_code=event_code,
+            drive_value=drive_value,
+            client_time_ms=client_time_ms,
+        )
+
+
+control_service = ControlProxyService()