Fix content holes in Actions task logs file (#25560)

Fix #25451.

Bugfixes:
- When stopping the zombie or endless tasks, set `LogInStorage` to true
after transferring the file to storage. It was missing, it could write
to a nonexistent file in DBFS because `LogInStorage` was false.
- Always update `ActionTask.Updated` when there's a new state reported
by the runner, even if there's no change. This is to avoid the task
being judged as a zombie task.

Enhancement:
- Support `Stat()` for DBFS file.
- `WriteLogs` refuses to write if it could result in content holes.

---------

Co-authored-by: Giteabot <teabot@gitea.io>

models/actions/task.go

@@ -344,6 +344,9 @@ func UpdateTask(ctx context.Context, task *ActionTask, cols ...string) error {
 	return err
 }
 
+// UpdateTaskByState updates the task by the state.
+// It will always update the task if the state is not final, even there is no change.
+// So it will update ActionTask.Updated to avoid the task being judged as a zombie task.
 func UpdateTaskByState(ctx context.Context, state *runnerv1.TaskState) (*ActionTask, error) {
 	stepStates := map[int64]*runnerv1.StepState{}
 	for _, v := range state.Steps {
@@ -384,6 +387,12 @@ func UpdateTaskByState(ctx context.Context, state *runnerv1.TaskState) (*ActionT
 		}, nil); err != nil {
 			return nil, err
 		}
+	} else {
+		// Force update ActionTask.Updated to avoid the task being judged as a zombie task
+		task.Updated = timeutil.TimeStampNow()
+		if err := UpdateTask(ctx, task, "updated"); err != nil {
+			return nil, err
+		}
 	}
 
 	if err := task.LoadAttributes(ctx); err != nil {