fix: daily_work_reports 테이블명 충돌 → partner_work_reports로 변경

기존 TBM 시스템의 daily_work_reports 테이블과 이름 충돌.
협력업체 업무현황 테이블을 partner_work_reports로 분리.

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

scripts/migration-purchase-safety.sql

@@ -98,9 +98,9 @@ CREATE TABLE IF NOT EXISTS partner_work_checkins (
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 
 -- ============================================================
--- 5. daily_work_reports (일일 작업 보고)
+-- 5. partner_work_reports (협력업체 일일 작업 보고)
 -- ============================================================
-CREATE TABLE IF NOT EXISTS daily_work_reports (
+CREATE TABLE IF NOT EXISTS partner_work_reports (
   id              INT AUTO_INCREMENT PRIMARY KEY,
   schedule_id     INT NOT NULL,
   checkin_id      INT NOT NULL,