docs: add pl_customer_stop_pref migration for stop logistics memory

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

docs/sql/migrations/2026-08-26-pl-customer-stop-pref.sql

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+-- 运输计划 · 客户装/送货物流默认记忆
+-- 设计: docs/superpowers/specs/2026-08-26-pl-customer-stop-pref-design.md
+
+SET NAMES utf8mb4;
+
+CREATE TABLE IF NOT EXISTS `pl_customer_stop_pref` (
+  `id` varchar(64) NOT NULL COMMENT '主键ID',
+  `customer_id` varchar(64) NOT NULL COMMENT '客户ID',
+  `customer_name` varchar(200) DEFAULT NULL COMMENT '客户名称',
+  `stop_type` varchar(20) NOT NULL COMMENT 'load-装货 delivery-送货',
+  `address` varchar(500) DEFAULT NULL COMMENT '地址',
+  `lng` decimal(10,6) DEFAULT NULL COMMENT '经度',
+  `lat` decimal(10,6) DEFAULT NULL COMMENT '纬度',
+  `contact` varchar(200) DEFAULT NULL COMMENT '联系方式',
+  `notes` varchar(500) DEFAULT NULL COMMENT '注意事项',
+  `tenant_no` varchar(64) NOT NULL DEFAULT 'shanxia2.0' COMMENT '租户编号',
+  `order_num` int(11) DEFAULT NULL COMMENT '排序号',
+  `remark` varchar(512) DEFAULT NULL COMMENT '备注',
+  `create_by` varchar(64) DEFAULT NULL COMMENT '创建人id',
+  `create_dept_id` varchar(64) NOT NULL DEFAULT '' COMMENT '创建人部门ID',
+  `create_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+  `update_by` varchar(64) DEFAULT NULL COMMENT '更新人id',
+  `update_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
+  `del_flag` smallint(6) NOT NULL DEFAULT '0' COMMENT '删除标记：0-正常 1-已删除',
+  PRIMARY KEY (`id`) USING BTREE,
+  UNIQUE KEY `uk_pl_cust_stop_pref` (`tenant_no`, `customer_id`, `stop_type`) USING BTREE,
+  KEY `idx_tenant` (`tenant_no`) USING BTREE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='运输计划-客户装卸货默认记忆';