API changes

for AmazonStore , SubmitStoreResult , and ShopifyStore types

• requestId string field is introduced
• isSubmitted boolean flag is introduced

The requestId filed is no longer an indicator of a successfully submitted cart store, it’s created as soon as the store is added to the cart and doesn’t change anymore, to figure out if the cart store order was submitted or not you can use the isSubmitted boolean flag

Resolved issues

Previously when submitCart was called and the mutation result is lost, there was no way to figure our the requestId, now this problem is solved by pre-generated requestId