Payment mandates now expose an id field

In API version 2026-07 and later, the PaymentMandateResource object includes a new id field.

PaymentMandateResource is returned by the mandates connection on CustomerPaymentMethod. Its id is the same as the corresponding CustomerPaymentMethod.id, which lets you determine which payment method to use for a given mandate scope (for example, the SUBSCRIPTIONS scope) when a single payment instrument is associated with multiple mandate types.