Add some transactions/performance monitoring

I navigate through the app on Android and iOS, but no transactions or spans were captured.
Including adding some items to cart and checking out.

<img width="1163" alt="Image" src="https://github.com/user-attachments/assets/7d785b31-111d-46ac-82d7-cb186b7ad4cd" />

![Image](https://github.com/user-attachments/assets/a8bdc2ae-0e87-4c23-b1fd-68ba25d63a6f)