fix(compose): frontend.depends_on 누락된 6개 lab 추가

lotto, stock-lab, agent-office, personal, packs-lab, travel-proxy 가
누락되어 있어 한 컨테이너 다운 시 nginx upstream resolve 실패 위험.
이번 사이클에 lotto httpx 사고로 명시화된 risk 를 해소.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

docker-compose.yml

@@ -241,9 +241,15 @@ services:
     container_name: frontend
     restart: unless-stopped
     depends_on:
+      - lotto
+      - stock-lab
       - music-lab
       - blog-lab
       - realestate-lab
+      - agent-office
+      - personal
+      - packs-lab
+      - travel-proxy
     ports:
       - "8080:80"
     volumes: