add user with tasks and endpoint

src/services/users.py

@@ -1,6 +1,6 @@
 from fastapi import HTTPException
 
-from src.schemas.users import User, UserUpdate
+from src.schemas.users import User, UserUpdate, UserWithTasks
 from src.services.base import BaseService
 
 
@@ -43,3 +43,4 @@ class UserService(BaseService):
         user = await self.session.user.get_one_with_load(user_id)
         if user is None:
             raise HTTPException(status_code=404, detail="User not found.")
+        return UserWithTasks.model_validate(user)