feat(pl): add personnel sys_user_id and transport escort columns

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

docs/sql/migrations/2026-09-13-pl-driver-plan-schema.sql

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+-- 司机运输计划：驾押人员关联系统用户 + 运输单/计划押运冗余字段
+SET NAMES utf8mb4;
+
+-- 驾押人员关联系统用户
+ALTER TABLE `pl_personnel`
+  ADD COLUMN `sys_user_id` varchar(64) DEFAULT NULL COMMENT '关联系统用户ID' AFTER `photo_urls`;
+
+-- 运输单押运（与司机对称）
+ALTER TABLE `pl_transport`
+  ADD COLUMN `escort_id` varchar(64) DEFAULT NULL COMMENT '押运员人员ID' AFTER `driver_phone`,
+  ADD COLUMN `escort_name` varchar(100) DEFAULT NULL COMMENT '押运员姓名' AFTER `escort_id`,
+  ADD COLUMN `escort_phone` varchar(32) DEFAULT NULL COMMENT '押运员电话' AFTER `escort_name`;
+
+-- 计划冗余押运（与 driver_id/driver_name 对称）
+ALTER TABLE `pl_plan`
+  ADD COLUMN `escort_id` varchar(64) DEFAULT NULL COMMENT '押运员人员ID' AFTER `driver_name`,
+  ADD COLUMN `escort_name` varchar(100) DEFAULT NULL COMMENT '押运员姓名' AFTER `escort_id`,
+  ADD COLUMN `escort_phone` varchar(32) DEFAULT NULL COMMENT '押运员电话' AFTER `escort_name`;