feat: implement V2 alert center and scoped alert governance

internal/worker/task_executor.go

@@ -217,7 +217,13 @@ func (e *TaskExecutor) runMethod(ctx context.Context, task *taskbiz.TimedTask) e
 	}
 	for attempt := 0; attempt <= options.MaxRetryTimes; attempt++ {
 		err = e.runMethodAttempt(ctx, task, method, options.Timeout)
-		if err == nil || ctx.Err() != nil || errors.Is(err, context.Canceled) || e.methodOrphaned(task.ID) {
+		if ctxErr := ctx.Err(); ctxErr != nil {
+			if errors.Is(ctxErr, context.DeadlineExceeded) {
+				return errTaskTimeout
+			}
+			return ctxErr
+		}
+		if err == nil || errors.Is(err, context.Canceled) || e.methodOrphaned(task.ID) {
 			return err
 		}
 		if attempt < options.MaxRetryTimes {

internal/worker/task_executor_test.go

@@ -95,6 +95,19 @@ func TestRunMethodCancellationStopsRetryDelay(t *testing.T) {
 	}
 }
 
+func TestRunMethodCancellationWinsConcurrentAttemptFailure(t *testing.T) {
+	for i := 0; i < 32; i++ {
+		ctx, cancel := context.WithCancel(context.Background())
+		registry := platformtask.NewRegistry()
+		registry.Register(platformtask.Method{Name: "cancel-at-return", Run: func(context.Context, json.RawMessage) error { cancel(); return errors.New("temporary") }})
+		err := (&TaskExecutor{methods: registry}).runMethod(ctx, &taskbiz.TimedTask{MethodName: "cancel-at-return", Params: []byte(`{"_execution":{"maxRetryTimes":3,"retryIntervalSeconds":60}}`)})
+		cancel()
+		if !errors.Is(err, context.Canceled) {
+			t.Fatalf("并发取消被执行错误覆盖: %v", err)
+		}
+	}
+}
+
 func TestRunMethodUsesParentContext(t *testing.T) {
 	const methodName = "worker-test-parent-context"
 	started := make(chan struct{})