Add RSS Feed Subscription Service

- RSS/Atom 피드 구독 및 관리 서비스 구현
- 자동 업데이트 스케줄러 포함 (기본 15분 주기)
- 피드 엔트리 읽음/별표 상태 관리
- 카테고리별 분류 기능
- OPML 내보내기 지원
- MongoDB 데이터 저장, Redis 캐싱
- Docker 컨테이너 구성 (포트 8017)

🤖 Generated with Claude Code (https://claude.ai/code)

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

docker-compose.yml

@@ -383,6 +383,35 @@ services:
       timeout: 10s
       retries: 3
 
+  # RSS Feed Service
+  rss-feed-backend:
+    build:
+      context: ./services/rss-feed/backend
+      dockerfile: Dockerfile
+    container_name: ${COMPOSE_PROJECT_NAME}_rss_feed_backend
+    ports:
+      - "8017:8000"
+    environment:
+      - MONGODB_URL=mongodb://mongodb:27017
+      - DB_NAME=rss_feed_db
+      - REDIS_URL=redis://redis:6379
+      - REDIS_DB=3
+      - DEFAULT_UPDATE_INTERVAL=900
+      - MAX_ENTRIES_PER_FEED=100
+      - ENABLE_SCHEDULER=true
+      - SCHEDULER_TIMEZONE=Asia/Seoul
+    depends_on:
+      - mongodb
+      - redis
+    networks:
+      - site11_network
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8000/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+
 networks:
   site11_network:
     driver: bridge