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/web/js/work-report-manage.js

@@ -47,7 +47,7 @@ async function loadReports() {
       return;
     }
 
-    const nameMap = Object.fromEntries(workers.map(w => [w.worker_id, w.worker_name]));
+    const nameMap = Object.fromEntries(workers.map(w => [w.user_id, w.worker_name]));
     const projMap = Object.fromEntries(projects.map(p => [p.project_id, p.project_name]));
     // const taskMap = Object.fromEntries(tasks.map(t => [t.task_id, `${t.category}:${t.subcategory}`])); // tasks 테이블 삭제됨
 
@@ -56,7 +56,7 @@ async function loadReports() {
       const tr = document.createElement('tr');
       tr.innerHTML = `
         <td>${i + 1}</td>
-        <td>${nameMap[r.worker_id] || r.worker_id}</td>
+        <td>${nameMap[r.user_id] || r.user_id}</td>
         <td><select data-id="project">
           ${projects.map(p =>
             `<option value="${p.project_id}" ${p.project_id === r.project_id ? 'selected' : ''}>${p.project_name}</option>`
@@ -107,7 +107,7 @@ async function loadReports() {
 
         const payload = {
           date: formatDate(r.date),  // 날짜 형식 변환
-          worker_id: r.worker_id,  // 기존 작업자 ID 유지
+          user_id: r.user_id,  // 기존 작업자 ID 유지
           project_id: Number(projectId),
           task_id: Number(taskId),
           overtime_hours: overtimeHours ? Number(overtimeHours) : null,