refactor: isolate pending transfer and config queries

tests/test_db_transferpending_queries.py

@@ -7,8 +7,10 @@
 """
 import pytest
 
+from app.db import decorators
 from app.db.models.transferpending import TransferPending
 from app.db.oper.transferpending import TransferPendingOper
+from app.db.session import SessionFactory
 
 
 @pytest.fixture(autouse=True)
@@ -150,6 +152,40 @@ def test_oper_returns_plain_tuples_not_orm_instances(db):
     assert all(isinstance(item, tuple) for item in listed)
 
 
+def test_oper_reuses_explicit_query_session(db, monkeypatch):
+    """TransferPendingOper 查询必须复用调用方会话。"""
+    db.add(TransferPending(
+        storage="local",
+        src_path="/mnt/explicit.mkv",
+        created_at="2026-08-13 10:00:00",
+    ))
+    monkeypatch.setattr(
+        decorators,
+        "ScopedSession",
+        lambda: (_ for _ in ()).throw(AssertionError("不应创建额外同步会话")),
+    )
+
+    assert ("local", "/mnt/explicit.mkv") in TransferPendingOper(db.session).list_all()
+
+
+def test_model_legacy_query_keeps_keyword_abi(db, monkeypatch):
+    """旧插件以关键字直调 TransferPending 时仍自动补入短会话。"""
+    db.add(TransferPending(
+        storage="local",
+        src_path="/mnt/legacy.mkv",
+        created_at="2026-08-13 10:00:00",
+    ))
+    opened = []
+    monkeypatch.setattr(
+        decorators,
+        "ScopedSession",
+        lambda: (opened.append(True) or SessionFactory()),
+    )
+
+    assert TransferPending.list_all(limit=1)
+    assert opened == [True]
+
+
 def test_oper_drops_rows_with_missing_fields(db):
     """
     回放时必须跳过字段残缺的历史遗留行，不能把空存储送进整理链。