refactor: System1 API 인증 체계 SSO 전환 및 마이그레이션 정비

- SSO JWT 인증으로 전환 (auth.service.js)
- worker_id → user_id 마이그레이션 완료
- departments 연동, CORS 미들웨어 정리
- 불필요 파일 삭제 (tk_database.db, visitRequestController.js)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

system1-factory/api/controllers/workerController.js

@@ -33,7 +33,7 @@ exports.createWorker = asyncHandler(async (req, res) => {
     try {
       const db = await getDb();
       const username = await generateUniqueUsername(workerData.worker_name, db);
-      const hashedPassword = await bcrypt.hash('1234', 10);
+      const hashedPassword = await bcrypt.hash(process.env.DEFAULT_PASSWORD || 'changeme!1', 10);
 
       // User 역할 조회
       const [userRole] = await db.query('SELECT id FROM roles WHERE name = ?', ['User']);
@@ -139,13 +139,6 @@ exports.updateWorker = asyncHandler(async (req, res) => {
   const workerData = { ...req.body, user_id: id };
   const createAccount = req.body.create_account;
 
-  console.log('🔧 작업자 수정 요청:', {
-    user_id: id,
-    받은데이터: req.body,
-    처리할데이터: workerData,
-    create_account: createAccount
-  });
-
   // 먼저 현재 작업자 정보 조회 (계정 여부 확인용, user_id 기준)
   const currentWorker = await workerModel.getByUserId(id);
 
@@ -166,7 +159,7 @@ exports.updateWorker = asyncHandler(async (req, res) => {
     // 계정 생성
     try {
       const username = await generateUniqueUsername(workerData.worker_name, db);
-      const hashedPassword = await bcrypt.hash('1234', 10);
+      const hashedPassword = await bcrypt.hash(process.env.DEFAULT_PASSWORD || 'changeme!1', 10);
 
       const [userRole] = await db.query('SELECT id FROM roles WHERE name = ?', ['User']);