-- 出入库单 · 工厂现场人员免登录链接
-- Spec: docs/superpowers/specs/2026-06-23-pl-site-inventory-link-design.md

ALTER TABLE db_inbound_outbound
  ADD COLUMN site_access_token VARCHAR(64) NULL COMMENT '现场人员免登录访问令牌' AFTER remark,
  ADD COLUMN site_feedback_remark VARCHAR(500) NULL COMMENT '现场回执备注' AFTER site_access_token,
  ADD COLUMN site_feedback_images TEXT NULL COMMENT '现场回执附件URLs（JSON数组）' AFTER site_feedback_remark,
  ADD COLUMN site_feedback_time DATETIME NULL COMMENT '现场回执保存时间' AFTER site_feedback_images;

CREATE UNIQUE INDEX uk_db_inbound_outbound_site_token
  ON db_inbound_outbound(site_access_token);