HT通知レイアウトに通番を追加

app/Util/Custom/HelloTechno/API.php

@@ -128,6 +128,7 @@ class API
         $param['mail_address2'] = $order->mail_address2;
         $param['mail_address3'] = $order->mail_address3;
         $param['mail_name'] = $order->mail_name;
+        $param['seq_number'] = $order->seq_number;
         $param['updated_at'] =  static::formatDateStr($order->updated_at);
         return $param;
     }