feat: 开放API产品相关

app/openapi/model/ProductPurchasePlatformModel.php

@@ -0,0 +1,15 @@
+<?php
+declare (strict_types = 1);
+
+namespace app\openapi\model;
+
+use app\common\model\ProductPurchasePlatformBaseModel;
+
+/**
+ * 产品购买链接平台模型
+ * @mixin \think\Model
+ */
+class ProductPurchasePlatformModel extends ProductPurchasePlatformBaseModel
+{
+    //
+}