refactor: worker_id → user_id 전체 마이그레이션 (Phase 1-4)

sso_users.user_id를 단일 식별자로 통합. JWT에서 worker_id 제거,
department_id/is_production 추가. 백엔드 15개 모델, 11개 컨트롤러,
4개 서비스, 7개 라우트, 프론트엔드 32+ JS/11+ HTML 변환.

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

system1-factory/api/services/auth.service.js

@@ -57,7 +57,7 @@ const loginService = async (username, password, ipAddress, userAgent) => {
 
 
     const token = jwt.sign(
-      { user_id: user.user_id, username: user.username, role: user.role_name, role_id: user.role_id, access_level: user.access_level, worker_id: user.worker_id, name: user.name || user.username },
+      { user_id: user.user_id, username: user.username, role: user.role_name, role_id: user.role_id, access_level: user.access_level, name: user.name || user.username },
       process.env.JWT_SECRET || 'your-secret-key',
       { expiresIn: process.env.JWT_EXPIRES_IN || '24h' }
     );
@@ -81,8 +81,7 @@ const loginService = async (username, password, ipAddress, userAgent) => {
           username: user.username,
           name: user.name || user.username,
           role: user.role_name,
-          access_level: user.access_level,
-          worker_id: user.worker_id
+          access_level: user.access_level
         }
       }
     };