PUT/kb/{kb_id}/docs/{source_key}
{
"title": "售后退款规则",
"content": "markdown 或纯文本内容",
"metadata": { "tenant_id": "t_100", "source": "help-center" }
}GET/kb/{kb_id}/docs
{ "items": [{ "source_key": "refund-rule", "status": "ready", "chunk_count": 8 }] }DELETE/kb/{kb_id}/docs/{source_key}
{ "ok": true }推荐用业务主键构造 source_key。同 key 再推是覆盖更新，删除时同 key 下架，便于每天对账。