-- Keep cards offline across billing cycles only after a successful traffic-cutoff action.
ALTER TABLE `t_sim_card_info`
    ADD COLUMN `traffic_cutoff_cross_month_hold` TINYINT(1) NOT NULL DEFAULT 0 COMMENT '达量断网跨月保持：0否，1是' AFTER `traffic_cutoff_threshold`,
    ADD COLUMN `traffic_cutoff_triggered_at` DATETIME NULL DEFAULT NULL COMMENT '最近一次达量断网成功时间' AFTER `traffic_cutoff_cross_month_hold`;