Card-expiry reminders now show the card's real expiry date

Reminders sent ahead of a card expiring, and the card-recovery card shown in the customer portal, read the card's expiry date from a copy stored on the customer's payment method. That copy was written once when the card was first saved and was never updated afterward, so a card that Shopify's own records showed as updated or re-synced could still show its original, possibly stale, expiry date in a reminder or on the portal.

Both now read the expiry date from the card's Shopify-synced record instead, so the date shown always matches what Shopify has on file for that card.