feat(AlibabaAgent): 添加阿里巴巴产品标识字段

- 在产品数据中新增 is_alibaba 字段并设置默认值为 1
- 确保通过 AlibabaAgent 创建的产品具有正确的平台标识

app/services/ThirdParty/AlibabaAgent/ProductService.php

@@ -463,6 +463,7 @@ class ProductService extends AlibabaAgentBaseService
                 'temp_id'        => 105,
                 'concession_pri' => '0.00',
                 'cost_price'     => $costPrice,
+                'is_alibaba'     => 1
             ];
             $productId = Db::name('store_product')->insertGetId($productData);