fix: align overseas container scope migration

deploy/sql/海外区域统一增量-MySQL8.sql

@@ -1917,6 +1917,20 @@ DROP PROCEDURE assert_receiving_warehouse_assignment_ready;
 
 SELECT 'PASS' AS migration_status, '海外接柜仓预分配与柜级修改结构已就绪' AS message;
 
+-- 海外 PDA 接柜、作业与船节点均按柜级建模；客户归属保留在柜内各入仓计划。
+SET @ddl = (SELECT IF(EXISTS (SELECT 1 FROM information_schema.columns WHERE table_schema=DATABASE()
+  AND table_name='ll_receiving_container_session' AND column_name='customer_id'),
+  'ALTER TABLE ll_receiving_container_session DROP COLUMN customer_id', 'SELECT 1'));
+PREPARE stmt FROM @ddl; EXECUTE stmt; DEALLOCATE PREPARE stmt;
+SET @ddl = (SELECT IF(EXISTS (SELECT 1 FROM information_schema.columns WHERE table_schema=DATABASE()
+  AND table_name='ll_receiving_container_operation' AND column_name='customer_id'),
+  'ALTER TABLE ll_receiving_container_operation DROP COLUMN customer_id', 'SELECT 1'));
+PREPARE stmt FROM @ddl; EXECUTE stmt; DEALLOCATE PREPARE stmt;
+SET @ddl = (SELECT IF(EXISTS (SELECT 1 FROM information_schema.columns WHERE table_schema=DATABASE()
+  AND table_name='ll_container_shipping_gate' AND column_name='customer_id'),
+  'ALTER TABLE ll_container_shipping_gate DROP COLUMN customer_id', 'SELECT 1'));
+PREPARE stmt FROM @ddl; EXECUTE stmt; DEALLOCATE PREPARE stmt;
+
 -- 一件代发来源托盘与海外仓实物托盘分离，实物绑定不得覆盖来源身份。
 USE baiyue_lastleg;
 SET @ddl = (SELECT IF(EXISTS (SELECT 1 FROM information_schema.columns WHERE table_schema=DATABASE()