feat: 福安德智慧报价平台 - 完整业务模块

基于RuoYi-Vue2构建的智慧采购报价平台，包含：

后端（Spring Boot + MyBatis）:
- 物料管理 (BizMaterial)
- 供应商管理 (BizSupplier)
- 报价请求RFQ (BizRfq)
- 供应商报价单 (BizQuotation)
- 智慧比价分析 (BizComparison)
- 采购单 (BizPurchaseOrder)
- 供应商评价 (BizSupplierEvaluation)
- 订单异议 (BizOrderObjection)
- 交易记录 (BizTransaction)
- 租户管理-SaaS数据隔离 (BizTenant)

前端（Vue2 + Element UI）:
- 10个业务模块完整页面
- ERPNext风格主题（蓝色系）
- 福安德品牌logo

部署:
- Docker Compose一键部署
- MySQL 8.0 + Redis 7 + Nginx
- 前端端口 10031

ruoyi-system/src/main/resources/mapper/bid/BizComparisonMapper.xml

@@ -0,0 +1,25 @@
+<?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.ruoyi.system.mapper.bid.BizComparisonMapper">
+  <select id="selectComparisonData" resultType="java.util.HashMap">
+    SELECT
+      ri.item_id       AS rfqItemId,
+      ri.material_name AS materialName,
+      ri.spec          AS spec,
+      ri.unit          AS unit,
+      ri.quantity      AS quantity,
+      qi.unit_price    AS unitPrice,
+      qi.total_price   AS totalPrice,
+      qi.delivery_days AS deliveryDays,
+      q.quotation_id   AS quotationId,
+      q.quote_no       AS quoteNo,
+      q.supplier_id    AS supplierId,
+      s.supplier_name  AS supplierName
+    FROM biz_rfq_item ri
+    LEFT JOIN biz_quotation_item qi ON qi.rfq_item_id = ri.item_id
+    LEFT JOIN biz_quotation q ON q.quotation_id = qi.quotation_id AND q.status = 'submitted'
+    LEFT JOIN biz_supplier s ON s.supplier_id = q.supplier_id
+    WHERE ri.rfq_id = #{rfqId}
+    ORDER BY ri.item_id, qi.unit_price
+  </select>
+</mapper>