fix(firstleg): use short cabinet pallet identities

deploy/sql/头程数据库统一增量-MySQL8.sql

@@ -1884,7 +1884,7 @@ CREATE TABLE fl_customs_frozen_document_inbound (
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT='开始报关时冻结的客户资料覆盖范围';
 
 CREATE TABLE fl_document_sequence (
-  sequence_key varchar(32) NOT NULL COMMENT '单据类型与北京时间日期组合键，例如CAB:20260818',
+  sequence_key varchar(32) NOT NULL COMMENT '单据序列键；日序列如CB:20260818，柜次长期序列固定为CABINET',
   current_value int unsigned NOT NULL COMMENT '该类型当日已分配的最大序号',
   PRIMARY KEY (sequence_key),
   CONSTRAINT chk_fl_document_sequence_value CHECK ((current_value > 0))
@@ -3195,7 +3195,7 @@ CREATE TABLE fl_loading_pallet_label (
   destination_warehouse_code varchar(64) NOT NULL COMMENT 'FBA仓编码快照',
   destination_warehouse_name varchar(128) DEFAULT NULL COMMENT 'FBA仓名称快照',
   pallet_index int unsigned NOT NULL COMMENT '当前柜当前FBA仓内从1开始的序号',
-  pallet_code varchar(128) NOT NULL COMMENT '托盘码：集装箱号-FBA仓编码-三位序号',
+  pallet_code varchar(128) NOT NULL COMMENT '托盘码：平台柜次号-FBA仓内部编号-三位序号；不依赖可跨提单复用的真实柜号',
   created_at datetime(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) COMMENT '生成时间',
   PRIMARY KEY (id),
   UNIQUE KEY uk_loading_pallet_code (pallet_code),