fix:배포 시 storage/logs를 shared 심링크로 변경

- 기존: mkdir로 릴리즈 디렉토리에 logs 생성 → 배포마다 로그 유실
- 변경: ln -sfn shared/storage/logs → 로그 영속 보존
- 원인: 전자계약 PDF 합성 오류 추적 중 발견

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

Jenkinsfile

@@ -40,10 +40,10 @@ pipeline {
 
                         ssh ${DEPLOY_USER}@211.117.60.189 '
                             cd /home/webservice/mng/releases/${RELEASE_ID} &&
-                            mkdir -p bootstrap/cache storage/framework/{views,cache/data,sessions} storage/logs &&
-                            sudo chown -R www-data:webservice storage/logs &&
+                            mkdir -p bootstrap/cache storage/framework/{views,cache/data,sessions} &&
                             ln -sfn /home/webservice/mng/shared/.env .env &&
                             ln -sfn /home/webservice/mng/shared/storage/app storage/app &&
+                            ln -sfn /home/webservice/mng/shared/storage/logs storage/logs &&
                             composer install --no-dev --optimize-autoloader --no-interaction &&
                             npm install --prefer-offline &&
                             npm run build &&