Reconcile delayed frame sync before scheduled writes

tests/test_display.py

@@ -152,3 +152,55 @@ def test_offline(service):
     id = submit(service)
     service.process_one()
     assert service.operation(id)["error"]["code"] == "DEVICE_OFFLINE"
+
+
+def test_late_sync_resolves_unknown_without_upload_retry(service, monkeypatch):
+    id = submit(service)
+    service.process_one()
+    service.update(id, "UNKNOWN")
+    driver = service.registry.get("living-room")
+    calls = []
+    device = driver.device
+    monkeypatch.setattr(driver, "device", lambda **kw: calls.append(kw) or device(**kw))
+    service.sync()
+    assert service.operation(id)["status"] == "COMPLETED"
+    assert driver.client.uploads == 1
+    assert calls == [{"refresh": True}]
+    assert not service.blocked("living-room")
+    assert service.db.one(
+        "SELECT confirmed_at FROM managed_cloud_uploads WHERE operation_id=?", (id,)
+    )["confirmed_at"]
+
+
+def test_unknown_wrong_target_stays_locked_and_queries_at_most_once_per_minute(
+    service, monkeypatch
+):
+    id = submit(service)
+    service.process_one()
+    service.update(id, "UNKNOWN")
+    driver = service.registry.get("living-room")
+    driver.client.display(1)
+    driver.invalidate()
+    calls = []
+    device = driver.device
+    monkeypatch.setattr(driver, "device", lambda **kw: calls.append(kw) or device(**kw))
+    service.sync()
+    service.sync()
+    assert service.operation(id)["status"] == "UNKNOWN"
+    assert service.blocked("living-room")
+    assert driver.client.uploads == 1
+    assert len(calls) == 1
+
+
+def test_unknown_matching_image_without_sync_stays_locked(service, monkeypatch):
+    id = submit(service)
+    service.process_one()
+    service.update(id, "UNKNOWN")
+    driver = service.registry.get("living-room")
+    device = driver.device()
+    device.current_content.synced = False
+    monkeypatch.setattr(driver, "device", lambda **kw: device)
+    service.sync()
+    assert service.operation(id)["status"] == "UNKNOWN"
+    assert service.blocked("living-room")
+    assert driver.client.uploads == 1

tests/test_scheduler.py

@@ -75,3 +75,21 @@ def test_playlist(app, service):
 def test_invalid_cron():
     with pytest.raises(FlowError):
         next_run(Schedule(type="cron", cron="* * * * * *"))
+
+
+def test_worker_checks_late_sync_before_due_tasks(app, service, monkeypatch):
+    scheduler = app.state.scheduler
+    calls = []
+    monkeypatch.setattr(service, "sync", lambda: calls.append("sync"))
+
+    def tick():
+        calls.append("tick")
+        scheduler.stop_event.set()
+
+    monkeypatch.setattr(scheduler, "tick", tick)
+    monkeypatch.setattr(service, "expire", lambda: None)
+    monkeypatch.setattr(service.cloud_library, "sweep", lambda: None)
+    monkeypatch.setattr(service.local_retention, "sweep", lambda: None)
+    monkeypatch.setattr(service, "process_one", lambda: False)
+    scheduler.run()
+    assert calls[:2] == ["sync", "tick"]