refactor: 推进后端分层架构治理

app/db/models/transferhistory.py

@@ -7,7 +7,8 @@ from sqlalchemy import Boolean, Index, Integer, JSON, String, delete, func, or_,
 from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy.orm import Mapped, Session, mapped_column
 
-from app.db import Base, async_db_query, db_query, db_update, execute_dml, get_id_column
+from app.db.base import Base, execute_dml, get_id_column
+from app.db.decorators import async_db_query, db_query, db_update
 from app.db.models._constraints import media_identity_constraint
 from app.schemas.types import MUSIC_ENTITY_ALBUM, MUSIC_ENTITY_RECORDING, MediaSource, MediaType