fix(): copy domain entities upon uow.add

src/template_project/adapters/unit_of_work.py

@@ -1,7 +1,9 @@
+import copy
 from typing import Any, override
 
 from sqlalchemy.ext.asyncio import AsyncSession
 
+from template_project.application.common.entity import Entity
 from template_project.application.common.unit_of_work import UnitOfWork
 
 
@@ -11,7 +13,8 @@ class DefaultUnitOfWork(UnitOfWork):
 
     @override
     async def add(self, *entities: Any) -> None:
-        self._session.add_all(entities)
+        filtered_entities = [copy.copy(entity) if isinstance(entity, Entity) else entity for entity in entities]
+        self._session.add_all(filtered_entities)
         await self._session.flush()
 
     @override