fix(tkfb): project_code → job_no 컬럼명 수정 (500 에러 해결)

projects 테이블에 project_code 컬럼이 없고 job_no가 올바른 컬럼명.
백엔드 SQL에서는 pr.job_no AS project_code alias 사용,
프론트 드롭다운에서는 p.job_no로 직접 참조.

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

system1-factory/api/models/meetingModel.js

@@ -57,7 +57,7 @@ const MeetingModel = {
 
     // 안건
     const [items] = await db.query(`
-      SELECT ai.*, pr.project_name, pr.project_code,
+      SELECT ai.*, pr.project_name, pr.job_no AS project_code,
              ms.milestone_name, ms.milestone_date,
              su.name AS responsible_name
       FROM meeting_agenda_items ai
@@ -185,7 +185,7 @@ const MeetingModel = {
     const db = await getDb();
     let sql = `
       SELECT ai.*, m.title AS meeting_title, m.meeting_date,
-             pr.project_name, pr.project_code,
+             pr.project_name, pr.job_no AS project_code,
              su.name AS responsible_name
       FROM meeting_agenda_items ai
       JOIN meeting_minutes m ON ai.meeting_id = m.meeting_id