feat(RechargeProductRepoInterface): 添加查找 FTAI 产品的方法

- 在 RechargeProductRepoInterface接口中添加了 findFtaiProduct 方法
- 新方法用于根据 UID 和点数类型查找 FTAI 产品
- 引入了 PointType 枚举类

src/Domain/Product/Repository/RechargeProductRepoInterface.php

@@ -9,6 +9,7 @@
 
 namespace Singularity\HDK\Pay\Domain\Product\Repository;
 
+use Singularity\HDK\Pay\Domain\Account\Enum\PointType;
 use Singularity\HDK\Pay\Domain\Product\Aggregate\RechargeProduct;
 
 interface RechargeProductRepoInterface
@@ -23,4 +24,11 @@ interface RechargeProductRepoInterface
      * @return RechargeProduct
      */
     public function findEmaProduct(string $uid): RechargeProduct;
+
+    /**
+     * @param string $uid
+     * @param PointType $pointType
+     * @return RechargeProduct
+     */
+    public function findFtaiProduct(string $uid, PointType $pointType): RechargeProduct;
 }