fix(runtime): distinguish event loop owners (#6425)

Co-authored-by: jxxghp <jxxghp@gmail.com>

app/startup/lifecycle/__init__.py

@@ -513,6 +513,7 @@ async def lifespan(app: FastAPI):
     health = get_application_health(app)
     health.begin_startup()
     main_loop = asyncio.get_running_loop()
+    main_loop_owner: object | None = None
     enabled_components: tuple[LifecycleComponent, ...] = ()
     started_component_names: set[str] = set()
     active_start_component: LifecycleComponent | None = None
@@ -522,7 +523,7 @@ async def lifespan(app: FastAPI):
             safe_mode=settings.MOVIEPILOT_SAFE_MODE,
         )
         print("Starting up...")
-        global_vars.set_loop(main_loop)
+        main_loop_owner = global_vars.set_loop(main_loop)
         components = build_lifecycle_components(app)
         enabled_components = tuple(
             component
@@ -567,7 +568,8 @@ async def lifespan(app: FastAPI):
         except Exception as cleanup_error:
             logger.error(f"启动失败后的生命周期清理失败：{cleanup_error}")
         finally:
-            global_vars.clear_loop(main_loop)
+            if main_loop_owner is not None:
+                global_vars.clear_loop(main_loop_owner)
         raise
     try:
         # 在此处 yield，表示应用已经启动，控制权交回 FastAPI 主事件循环
@@ -585,4 +587,5 @@ async def lifespan(app: FastAPI):
                 # 日志最后关闭，确保其他组件的收尾信息已写入文件
                 LoggerManager.shutdown()
             finally:
-                global_vars.clear_loop(main_loop)
+                if main_loop_owner is not None:
+                    global_vars.clear_loop(main_loop_owner)