ALTER TABLE `digital_employee_sync_record`
    ADD COLUMN `contract_version` VARCHAR(128) DEFAULT NULL COMMENT '客户端同步契约版本' AFTER `operation`,
    ADD COLUMN `entity_summary` JSON DEFAULT NULL COMMENT '客户端实体摘要' AFTER `contract_version`,
    ADD COLUMN `business_view` JSON DEFAULT NULL COMMENT '客户端业务视图投影' AFTER `entity_summary`;
