{"code":0,"message":"success","data":{"service":"项目数据服务 JSON 接口","endpoints":{"健康检查":"/healthz","表清单":"/api/tables","表数据":"/api/tables/{表名}?page=1&page_size=50","列取值":"/api/tables/{表名}/distinct?column=大区","总览":"/api/summary"},"说明":"默认以中文列名作为 JSON 的键；加 ?label=raw 可切换为物理列名。","鉴权":{"已启用":true,"方式":"HTTP Header 三要素：appcode / timestamp / token","appcode":"projdata","timestamp":"调用时刻毫秒时间戳","token":"SHA256(appcode + secret + timestamp + secret + appcode)","有效期":"±300 秒"}}}