fix(backup-service): 修复健康检查配置不一致问题

- 将 Dockerfile 从 wget 改为 curl
- 统一 Dockerfile 和 docker-compose.yml 健康检查工具
- 增加 start_period 从 5s 到 40s，给予服务更多启动时间

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

backend/services/backup-service/Dockerfile

@@ -24,10 +24,10 @@ FROM node:20-slim AS production
 
 WORKDIR /app
 
-# Install OpenSSL and wget for health checks
+# Install OpenSSL and curl for health checks
 RUN apt-get update && apt-get install -y --no-install-recommends \
     openssl \
-    wget \
+    curl \
     && rm -rf /var/lib/apt/lists/*
 
 # Create non-root user for security
@@ -55,8 +55,8 @@ USER nestjs
 EXPOSE 3002
 
 # Health check
-HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
-    CMD wget --no-verbose --tries=1 --spider http://localhost:3002/health || exit 1
+HEALTHCHECK --interval=30s --timeout=3s --start-period=40s --retries=3 \
+    CMD curl -f http://localhost:3002/health || exit 1
 
 # Start the application
 CMD ["node", "dist/src/main.js"]