fix: fixes to match balance fields and referal balance fixes

routes/auth.py

@@ -41,6 +41,7 @@ async def signup(req: UserRegistration, session: AsyncSession = Depends(get_db))
                 username=user.username,
                 telegram_id=user.telegram_id,
                 referal_code=user.referal_code,
+                bonus_balance=user.balance,
             ).model_dump(),
             status_code=201,
         )