fix: forbidden starting and finishing shifts for deleted users

services/work_shifts.py

@@ -31,7 +31,7 @@ class WorkShiftsService(BaseService):
 
     async def start_shift(self, user_id: int) -> StartShiftResponse:
         employee = await self.session.get(User, user_id)
-        if not employee:
+        if not employee or employee.is_deleted:
             return StartShiftResponse(ok=False, message=f"Пользователь с ID {user_id} не найден")
 
         work_shift = await self._get_last_work_shift_for_today(user_id)
@@ -47,7 +47,7 @@ class WorkShiftsService(BaseService):
 
     async def finish_shift(self, user: User, user_id: int) -> FinishShiftResponse:
         employee = await self.session.get(User, user_id)
-        if not employee:
+        if not employee or employee.is_deleted:
             return FinishShiftResponse(ok=False, message=f"Пользователь с ID {user_id} не найден")
 
         work_shift = await self._get_last_work_shift_for_today(user_id)