fix(runtime): 收口调度与事件异步任务生命周期 (#6415)

app/runtime/event/dispatch.py

@@ -29,6 +29,7 @@ class EventDispatcher:
         event_loop: Callable[[], Any],
         event_factory: Callable[..., Any],
         error_handler: Callable[..., None],
+        async_handle_sink: Callable[[Any], bool] | None = None,
     ) -> None:
         """注入注册表、绑定器、执行器和错误策略回调。"""
         self._registry = registry
@@ -37,6 +38,7 @@ class EventDispatcher:
         self._event_loop = event_loop
         self._event_factory = event_factory
         self._error_handler = error_handler
+        self._async_handle_sink = async_handle_sink
 
     def dispatch_chain(self, event: Any) -> bool:
         """同步按优先级顺序执行链式事件快照。"""
@@ -119,10 +121,18 @@ class EventDispatcher:
                 correlation_id=event.correlation_id,
             )
             if inspect.iscoroutinefunction(handler):
-                asyncio.run_coroutine_threadsafe(
-                    self.safe_invoke_async(handler, isolated),
-                    self._event_loop(),
-                )
+                coroutine = self.safe_invoke_async(handler, isolated)
+                if self._async_handle_sink:
+                    self._async_handle_sink(coroutine)
+                    continue
+                try:
+                    asyncio.run_coroutine_threadsafe(coroutine, self._event_loop())
+                except RuntimeError:
+                    coroutine.close()
+                    logger.warning(
+                        "事件 %s 的异步处理器无法投递，事件循环已停止",
+                        event.event_type,
+                    )
             else:
                 self._executor().submit(
                     self.safe_invoke_sync,