refactor: lint 적용

Author: Jihyun3478

src/services/__test__/qr.service.test.ts

@@ -5,7 +5,7 @@ import { QRLoginToken } from '@/types/models/QRLoginToken.type';
 import { Pool } from 'pg';
 import crypto from 'crypto';
 
-const validKey = crypto.randomBytes(32).toString('hex').slice(0, 32);
+const validKey = crypto.randomBytes(32).toString('utf8');
 
 jest.mock('@/utils/key.util', () => ({
   getKeyByGroup: () => validKey,