-- ============================================
-- V20: 为 member_user 表添加 deleted_at 字段
-- 原因：BaseEntity 已映射该字段，但 member_user 表缺失
-- ============================================

ALTER TABLE member_user
    ADD COLUMN IF NOT EXISTS deleted_at TIMESTAMP;

COMMENT ON COLUMN member_user.deleted_at IS '软删除时间';
