Introduce concatenatedOriginContract to subscriptionLine

As of 2025-01, we've introduced concatenatedOriginContract to subscriptionLine .

You can now query the origin contract of the lines if you have used the Subscription Billing Cycle APIs to combine multiple contracts. This can be accessed through subscriptionBillingCycle.editedContract.lines.concatenatedOriginContract.

Learn more about combining contract on Shopify.dev.