Integrate RestaurantsModule into AdminModule; enhance AdminRepository to find admins by phone and restaurant slug using AdminRole; update AuthService to throw specific exception message when admin not found; correct last name in DatabaseSeeder for consistency.

src/modules/auth/services/auth.service.ts

@@ -40,7 +40,7 @@ export class AuthService {
 
     const admin = await this.adminRepository.findByPhoneAndRestaurantSlug(phone, slug);
     if (!admin) {
-      throw new NotFoundException();
+      throw new NotFoundException(AuthMessage.ADMIN_NOT_FOUND);
     }
 
     const code = this.generateOtpCode();