fix(events): allow container nodes before ocean booking

deploy/sql/海外区域统一增量-MySQL8.sql

@@ -26,7 +26,7 @@ CREATE TABLE IF NOT EXISTS ll_loading_event_inbox (
 
 CREATE TABLE IF NOT EXISTS ll_container_shipping_gate (
   container_booking_id VARCHAR(128) NOT NULL COMMENT '来源头程柜预订ID',
-  ocean_booking_id VARCHAR(128) NOT NULL COMMENT '来源海运订舱ID', container_no VARCHAR(64) NOT NULL COMMENT '实际集装箱号',
+  ocean_booking_id VARCHAR(128) NULL COMMENT '来源海运订舱ID；货柜未关联订舱时为空', container_no VARCHAR(64) NOT NULL COMMENT '实际集装箱号',
   status VARCHAR(32) NOT NULL DEFAULT 'AWAITING_PICKUP_READY' COMMENT '海外收货门禁状态：AWAITING_PICKUP_READY、RECEIVING_AVAILABLE',
   standard_node VARCHAR(64) NULL COMMENT '最新有效标准船节点', node_sequence INT NOT NULL DEFAULT 0 COMMENT '最新有效节点单调序号',
   observed_at DATETIME(3) NULL COMMENT '供应商节点观测时间', actual_at DATETIME(3) NULL COMMENT '节点实际发生时间',
@@ -3307,7 +3307,7 @@ PREPARE phase4_inventory_stmt FROM @ddl; EXECUTE phase4_inventory_stmt; DEALLOCA
 -- 海运节点达到可提柜后才允许海外 PDA 认领；装柜完成只建立等待门禁快照。
 CREATE TABLE IF NOT EXISTS ll_container_shipping_gate (
   container_booking_id VARCHAR(128) NOT NULL COMMENT '来源头程柜预订ID',
-  ocean_booking_id VARCHAR(128) NOT NULL COMMENT '来源海运订舱ID',
+  ocean_booking_id VARCHAR(128) NULL COMMENT '来源海运订舱ID；货柜未关联订舱时为空',
   container_no VARCHAR(64) NOT NULL COMMENT '实际集装箱号',
   status VARCHAR(32) NOT NULL DEFAULT 'AWAITING_PICKUP_READY' COMMENT '海外收货门禁状态：AWAITING_PICKUP_READY、RECEIVING_AVAILABLE',
   standard_node VARCHAR(64) NULL COMMENT '最新有效标准船节点',
@@ -4604,3 +4604,7 @@ CALL assert_overseas_finance_p0_ready();
 DROP PROCEDURE IF EXISTS assert_overseas_finance_p0_ready;
 
 SELECT 'PASS' AS migration_status, '海外财务P0费用来源字段已就绪' AS message;
+
+-- 人工货柜节点独立于订舱：货柜尚未关联海运订舱时仍可同步当前节点。
+ALTER TABLE ll_container_shipping_gate
+  MODIFY ocean_booking_id VARCHAR(128) NULL COMMENT '来源海运订舱ID；货柜未关联订舱时为空';