fix: persist return forecast tail references

deploy/sql/头程数据库统一增量-MySQL8.sql

@@ -19356,3 +19356,18 @@ CALL baiyue_firstleg.assert_unified_final_schema();
 DROP PROCEDURE IF EXISTS baiyue_firstleg.assert_unified_final_schema;
 SELECT 'PASS' AS migration_status,
        '统一增量全部执行完成；父子订单、入库扣货、履约分片、装柜门禁、订舱拖车、报关船期、船司查询、仓库角色、费用、Finance人工财务、客户资金账户、公共资源、可靠审计及IAM安全事件结构校验通过' AS message;
+-- 退货预报关联尾程订单业务编号（测试阶段直接收敛当前结构）
+DROP PROCEDURE IF EXISTS baiyue_lastleg.converge_return_order_tail_reference;
+DELIMITER $$
+CREATE PROCEDURE baiyue_lastleg.converge_return_order_tail_reference()
+BEGIN
+  IF NOT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_schema='baiyue_lastleg' AND table_name='ll_return_order' AND column_name='lastleg_order_id') THEN
+    ALTER TABLE baiyue_lastleg.ll_return_order ADD COLUMN lastleg_order_id BIGINT NULL COMMENT '尾程订单ID' AFTER customer_reference_no;
+  END IF;
+  IF NOT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_schema='baiyue_lastleg' AND table_name='ll_return_order' AND column_name='lastleg_order_no') THEN
+    ALTER TABLE baiyue_lastleg.ll_return_order ADD COLUMN lastleg_order_no VARCHAR(32) NULL COMMENT '尾程订单号' AFTER lastleg_order_id;
+  END IF;
+END$$
+DELIMITER ;
+CALL baiyue_lastleg.converge_return_order_tail_reference();
+DROP PROCEDURE IF EXISTS baiyue_lastleg.converge_return_order_tail_reference;