fix: 캘린더 모달 중복 카드 문제 및 삭제 권한 개선

- monthly_worker_status 조회 시 GROUP BY로 중복 데이터 합산
- 작업보고서 삭제 권한을 그룹장 이상으로 제한 (admin, system, group_leader)
- 중복 데이터 정리를 위한 마이그레이션 SQL 추가 (009_fix_duplicate_monthly_status.sql)
- synology_deployment 버전에도 동일 수정 적용

api.hyungi.net/models/monthlyStatusModel.js

@@ -45,14 +45,30 @@ class MonthlyStatusModel {
     const db = await getDb();
     
     try {
+      // 중복 방지: worker_id와 date로 그룹화하고 최신 데이터만 조회
       const [rows] = await db.execute(`
         SELECT 
-          mws.*,
+          mws.worker_id,
           w.worker_name,
-          w.job_type
+          w.job_type,
+          MAX(mws.year) as year,
+          MAX(mws.month) as month,
+          mws.date,
+          SUM(mws.total_work_hours) as total_work_hours,
+          SUM(mws.actual_work_hours) as actual_work_hours,
+          SUM(mws.vacation_hours) as vacation_hours,
+          SUM(mws.total_work_count) as total_work_count,
+          SUM(mws.regular_work_count) as regular_work_count,
+          SUM(mws.error_work_count) as error_work_count,
+          MAX(mws.work_status) as work_status,
+          MAX(mws.has_vacation) as has_vacation,
+          MAX(mws.has_error) as has_error,
+          MAX(mws.has_issues) as has_issues,
+          MAX(mws.last_updated) as last_updated
         FROM monthly_worker_status mws
         JOIN workers w ON mws.worker_id = w.worker_id
         WHERE mws.date = ?
+        GROUP BY mws.worker_id, mws.date, w.worker_name, w.job_type
         ORDER BY w.worker_name ASC
       `, [date]);