refactor(db): 修复异步连接池无界增长，并完成 SQLAlchemy 2.0 迁移与分层归位 (#6320)

tests/test_transfer_tmdb_category.py

@@ -3,7 +3,8 @@ from types import SimpleNamespace
 from app.chain.transfer import TransferChain
 from app.domain.context import MediaInfo
 from app.domain.metainfo import MetaInfo
-from app.schemas import FileItem, TransferDirectoryConf, TransferTask
+from app.schemas import FileItem, TransferDirectoryConf
+from app.application.transfer import TransferTask
 from app.schemas.types import MediaSource, MediaType