feat(AlibabaAgent): 添加产品销售信息字段

- 在产品服务中新增 sale 字段用于存储销售信息
- 该字段包含产品的销售相关数据结构
- 为后续销售功能扩展提供数据支持

app/services/ThirdParty/AlibabaAgent/ProductService.php

@@ -317,6 +317,7 @@ class ProductService extends AlibabaAgentBaseService
             'price'         => $minPrice,
             'minPrice'      => $minPrice,
             'maxPrice'      => $maxPrice,
+            'sale'          => $saleInfo,
             'stock'         => $saleInfo['amountOnSale'] ?? 0,
             'unit'          => $saleInfo['unit'] ?? '件',
             'mainImage'     => $mainImage,