fix(backend): PR 合并治理 - 限制轮询并收敛模型目录事务

backend/internal/service/runtime_policy_test.go

@@ -31,7 +31,8 @@ func TestOnlyResumableNewAPIChannel2VideoDeadlinesStayRunning(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	base := model.Task{ID: "task-1", Type: "canvas_video", ProviderRequestID: "provider-task-1"}
+	startedAt := time.Now()
+	base := model.Task{ID: "task-1", Type: "canvas_video", ProviderRequestID: "provider-task-1", StartedAt: &startedAt}
 	if !svc.shouldDeferVideoProviderTask(base, string(input), context.DeadlineExceeded) {
 		t.Fatal("resumable NewAPI Channel 2 deadline should remain running")
 	}
@@ -39,6 +40,17 @@ func TestOnlyResumableNewAPIChannel2VideoDeadlinesStayRunning(t *testing.T) {
 	if !svc.shouldDeferVideoProviderTask(base, string(input), pendingErr) {
 		t.Fatal("resumable NewAPI Channel 2 provider sync delay should remain running")
 	}
+	expiredStartedAt := startedAt.Add(-newAPIChannel2TaskSyncMaxAge - time.Second)
+	expiredTask := model.Task{ID: base.ID, Type: base.Type, ProviderRequestID: base.ProviderRequestID, StartedAt: &expiredStartedAt}
+	if svc.shouldDeferVideoProviderTask(expiredTask, string(input), pendingErr) {
+		t.Fatal("provider sync delay must stop after the bounded synchronization window")
+	}
+	if !svc.shouldDeferVideoProviderTask(expiredTask, string(input), context.DeadlineExceeded) {
+		t.Fatal("a normal long-running provider task must remain resumable after the synchronization window")
+	}
+	if svc.shouldDeferVideoProviderTask(model.Task{ID: base.ID, Type: base.Type, ProviderRequestID: base.ProviderRequestID}, string(input), pendingErr) {
+		t.Fatal("provider sync delay without a persisted start time must fail closed")
+	}
 	if svc.shouldDeferVideoProviderTask(model.Task{ID: "task-2", Type: "canvas_video"}, string(input), context.DeadlineExceeded) {
 		t.Fatal("missing provider task id must not be deferred")
 	}