feat(flow): 添加排产明细钢卷关系管理功能

- 创建排产明细钢卷关系实体类 SchDetailCoilRel
- 定义业务对象 SchDetailCoilRelBo 和视图对象 SchDetailCoilRelVo
- 实现排产明细钢卷关系服务接口 ISchDetailCoilRelService
- 开发控制器 SchDetailCoilRelController 提供 REST API
- 创建数据访问层 SchDetailCoilRelMapper 和 XML 映射文件
- 实现服务层业务逻辑 SchDetailCoilRelServiceImpl
- 集成分页查询、新增、修改、删除等基础操作
- 添加 Excel 导出功能和数据验证机制

klp-flow/src/main/resources/mapper/flow/SchDetailCoilRelMapper.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper
+    PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+    "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.klp.flow.mapper.SchDetailCoilRelMapper">
+
+    <resultMap type="com.klp.flow.domain.SchDetailCoilRel" id="SchDetailCoilRelResult">
+        <result property="relId" column="rel_id"/>
+        <result property="scheduleDetailId" column="schedule_detail_id"/>
+        <result property="coilId" column="coil_id"/>
+        <result property="remark" column="remark"/>
+        <result property="createTime" column="create_time"/>
+        <result property="createBy" column="create_by"/>
+        <result property="updateTime" column="update_time"/>
+        <result property="updateBy" column="update_by"/>
+        <result property="delFlag" column="del_flag"/>
+    </resultMap>
+
+
+</mapper>