feat(proxy-input): 부적합 대분류/소분류 선택 추가

- 부적합 시간 > 0 → 대분류/소분류 드롭다운 표시
- issue_report_categories (nonconformity) + issue_report_items 연동
- 저장 시 work_report_defects에 category_id, item_id 포함

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

system1-factory/api/controllers/proxyInputController.js

@@ -137,8 +137,8 @@ const ProxyInputController = {
           );
           if (existingDefects.length === 0) {
             await conn.query(
-              `INSERT INTO work_report_defects (report_id, defect_hours, note) VALUES (?, ?, '대리입력')`,
-              [reportId, defectHours]
+              `INSERT INTO work_report_defects (report_id, defect_hours, category_id, item_id, note) VALUES (?, ?, ?, ?, '대리입력')`,
+              [reportId, defectHours, entry.defect_category_id || null, entry.defect_item_id || null]
             );
             await conn.query(
               'UPDATE daily_work_reports SET error_hours = ?, work_status_id = 2 WHERE id = ?',