add contract for product and refund parse

backend/app/Platform/Shopee/EntityParse/Refund.php

@@ -10,7 +10,7 @@ use App\Platform\Shopee\Constants\ReturnStatus as ShopeeReturnStatus;
 use App\Model\Company;
 use App\Model\Order;
 use App\Model\Store;
-use App\Entity\Parse\EntityParse;
+use App\Platform\AbstractRefundParse;
 use Carbon\Carbon;
 use Hyperf\Collection\LazyCollection;
 use InvalidArgumentException;
@@ -21,7 +21,7 @@ use InvalidArgumentException;
  * Shopee 具有完整的父子退款结构：一个 return 包含多个 item。
  * 每个 return 同时写入 refunds（主记录）和 refund_items（明细）两张表。
  */
-class Refund extends EntityParse
+class Refund extends AbstractRefundParse
 {
     /**
      * 缓存 entityMap 中查询到的订单日期映射，供 formatRefundItemsFromRaw 复用
@@ -178,7 +178,7 @@ class Refund extends EntityParse
      * @param array $platform_refund_id_to_local_refund_id_map [platform_refund_id => local db refund id]
      * @return array
      */
-    public function formatRefundItemsFromRaw(array $raw_data, array $platform_refund_id_to_local_refund_id_map): array
+    public function formatRefundItemsFromRaw(array $raw_data, ?array $platform_refund_id_to_local_refund_id_map): array
     {
         $records = isset($raw_data[0]) ? $raw_data : [$raw_data];
         $items = [];