feat(payments-next): Add redirects on mismatched cart uids Because:
commit f88ca40d9cd32778c63aa0fb6a3d50e4da76305c Author: Davey AlvarezDate: Thu Dec 18 12:44:10 2025 -0800 feat(payments-next): Add redirects on mismatched cart uids Because: * Users can currently view carts associated with another account's uid when provided with the URL This commit: * Adds in a frontend intercept that redirects the user to the start of the checkout process if the request cart's UID does not match the signed in user's UID Closes #PAY-3155