将persist和后端分离，方便替换为其他数据库

tests/integration/test_strategy_business_points_migrated.py

@@ -9,6 +9,7 @@ import pytest_asyncio
 from sync_state_machine.common.binding import BindingManager
 from sync_state_machine.common.collection import DataCollection
 from sync_state_machine.common.persistence import PersistenceBackend
+from sync_state_machine.common.sqlite_backend import SQLitePersistenceBackend
 from sync_state_machine.common.types import BindingStatus, SyncAction, SyncStatus
 from sync_state_machine.sync_system.resolve_ids import IDResolver
 from sync_state_machine.sync_system.config import OrphanAction, UpdateDirection
@@ -32,7 +33,7 @@ from tests.fixtures.mock_domain import (
 async def setup_env():
     register_test_domain()
     db = Path(tempfile.mkdtemp(prefix="sync_state_machine_biz_") ) / "state.db"
-    persistence = PersistenceBackend(str(db))
+    persistence = SQLitePersistenceBackend(str(db))
     await persistence.initialize()
 
     local = DataCollection("local", persistence=persistence, auto_persist=False)