fix(): add flush to uow.add to ensure db sync

src/template_project/application/common/unit_of_work.py

@@ -4,7 +4,7 @@ from typing import Any, Protocol
 
 class UnitOfWork(Protocol):
     @abstractmethod
-    def add(self, *entities: Any) -> None:
+    async def add(self, *entities: Any) -> None:
         raise NotImplementedError
 
     @abstractmethod

src/template_project/application/user/interactors/sign_up.py

@@ -43,7 +43,9 @@ class UserSignUpInteractor:
 
         response = UserSignUpResponse(access_token=crypted_access_token)
 
-        self.unit_of_work.add(user, access_token)
+        for entity in (user, access_token):  # preserve creation order
+            await self.unit_of_work.add(entity)
+
         await self.unit_of_work.commit()
 
         return response