fix(monthly-comparison): 0일 0h 수정 + 관리자 검토 태깅

- getAllStatus: daily_attendance_records JOIN으로 실제 근무일/시간 집계
- vacation_days: vacation_types.deduct_days SUM (반차 0.5 정확 반영)
- admin_checked 컬럼 + POST /admin-check API (upsert 패턴)
- 상태 뱃지 라벨: 미검토/확인요청/수정요청/반려/확인완료

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

system1-factory/web/pages/attendance/monthly-comparison.html

@@ -162,7 +162,7 @@
 
     <script src="/static/js/tkfb-core.js?v=2026033108"></script>
     <script src="/js/api-base.js?v=2026031701"></script>
-    <script src="/js/monthly-comparison.js?v=2026040101"></script>
+    <script src="/js/monthly-comparison.js?v=2026040102"></script>
     <script>initAuth();</script>
 </body>
 </html>