fix: redirect app.py transitive imports to index_sync_service to unblock CI collection

Agent-Logs-Url: https://github.com/OliverZhaohaibin/iPhotron-LocalPhotoAlbumManager/sessions/bea3ef59-3919-4353-87be-35ad415709c7

Co-authored-by: OliverZhaohaibin <160622109+OliverZhaohaibin@users.noreply.github.com>

Author: Copilot

src/iPhoto/library/workers/scanner_worker.py

@@ -7,7 +7,7 @@
 
 from PySide6.QtCore import QObject, QRunnable, Signal
 
-from ...app import load_incremental_index_cache
+from ...index_sync_service import load_incremental_index_cache
 from ...cache.index_store import get_global_repository
 from ...config import WORK_DIR_NAME
 from ...io.scanner_adapter import scan_album

tests/test_app_live_sync.py

@@ -2,7 +2,7 @@
 import pytest
 from pathlib import Path
 from unittest.mock import MagicMock, patch
-from iPhoto.app import _sync_live_roles_to_db
+from iPhoto.index_sync_service import sync_live_roles_to_db as _sync_live_roles_to_db
 from iPhoto.models.types import LiveGroup
 from iPhoto.cache.index_store import IndexStore
 from iPhoto.config import WORK_DIR_NAME