feat(pl): add notes column on transport address library

Persist address-level precautions for later fill into plan load/delivery notes.

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/sql/migrations/2026-09-02-pl-transport-address-notes.sql

@@ -0,0 +1,7 @@
+-- 运输地址库增加注意事项
+-- 设计: docs/superpowers/specs/2026-09-02-pl-transport-address-notes-fill-design.md
+
+SET NAMES utf8mb4;
+
+ALTER TABLE `pl_transport_address`
+  ADD COLUMN `notes` varchar(500) DEFAULT NULL COMMENT '注意事项' AFTER `contact_phone`;

docs/sql/shanxia2.0.sql

@@ -27529,6 +27529,7 @@ CREATE TABLE `pl_transport_address` (
   `lat` decimal(10,6) NOT NULL COMMENT '纬度',
   `contact_name` varchar(100) DEFAULT NULL COMMENT '联系人',
   `contact_phone` varchar(32) DEFAULT NULL COMMENT '联系电话',
+  `notes` varchar(500) DEFAULT NULL COMMENT '注意事项',
   `status` char(1) NOT NULL DEFAULT '1' COMMENT '状态 1-启用 0-停用',
   `tenant_no` varchar(64) NOT NULL DEFAULT 'shanxia2.0' COMMENT '租户编号',
   `order_num` int(11) DEFAULT NULL COMMENT '排序号',