{"name":"报名信息存储服务","version":"1.0.0","endpoints":["POST /api/registrations - 提交报名","GET /api/registrations - 获取报名列表","DELETE /api/registrations/:id - 删除报名","DELETE /api/registrations - 清空全部","GET /api/registrations/export - 导出CSV","GET /api/health - 健康检查"]}