修复：补强使用并发幂等复核

shierfeng-fastapi-backend/module_business/dao/operation_dao.py

@@ -132,8 +132,12 @@ class OperationDao:
         key_column: InstrumentedAttribute,
         idempotency_key: str,
         *extra_conditions: ColumnElement[bool],
+        for_update: bool = False,
     ) -> Any | None:
-        result = await db.execute(select(model).where(key_column == idempotency_key, *extra_conditions))
+        statement = select(model).where(key_column == idempotency_key, *extra_conditions)
+        if for_update:
+            statement = statement.with_for_update().execution_options(populate_existing=True)
+        result = await db.execute(statement)
         return result.scalar_one_or_none()
 
     @staticmethod
@@ -373,6 +377,8 @@ class OperationDao:
         db: AsyncSession,
         idempotency_key: str,
         site_ids: list[int] | None = None,
+        *,
+        for_update: bool = False,
     ) -> BizUsageRecord | None:
         return await cls._get_by_key(
             db,
@@ -380,6 +386,7 @@ class OperationDao:
             BizUsageRecord.idempotency_key,
             idempotency_key,
             *cls._usage_scope_conditions(site_ids),
+            for_update=for_update,
         )
 
     @classmethod