perf: slow down DHT announcing on errors (#1186)

pkg/rest/server_test.go

@@ -216,6 +216,7 @@ func TestPauseAndContinueTask(t *testing.T) {
 		if t2.Status != base.DownloadStatusPause {
 			t.Errorf("PauseTask() got = %v, want %v", t2.Status, base.DownloadStatusPause)
 		}
+		time.Sleep(time.Millisecond * 100)
 		httpRequestCheckOk[any](http.MethodPut, "/api/v1/tasks/"+taskId+"/continue", nil)
 		t3 := httpRequestCheckOk[*download.Task](http.MethodGet, "/api/v1/tasks/"+taskId, nil)
 		if t3.Status != base.DownloadStatusRunning {
@@ -240,6 +241,7 @@ func TestPauseAllAndContinueALLTasks(t *testing.T) {
 
 		createAndPause := func() {
 			taskId := httpRequestCheckOk[string](http.MethodPost, "/api/v1/tasks", createReq)
+			time.Sleep(time.Millisecond * 5)
 			httpRequestCheckOk[*download.Task](http.MethodPut, "/api/v1/tasks/"+taskId+"/pause", nil)
 		}
 
@@ -247,6 +249,7 @@ func TestPauseAllAndContinueALLTasks(t *testing.T) {
 		for i := 0; i < total; i++ {
 			createAndPause()
 		}
+		time.Sleep(time.Millisecond * 50)
 
 		// continue all
 		httpRequestCheckOk[any](http.MethodPut, "/api/v1/tasks/continue", nil)