Updates CVV for an existing virtual linked card

This endpoint updates the CVV of an existing virtual card linked to a customer.

A new CVV is generated for the card, and the time until expiration is returned.

This can be used for additional security or token rotation.

Important considerations

• card_id must be valid and belong to a linked/virtual card.
• The card must be active and in a valid state for CVV update.
• The new CVV is returned in the response along with its expiration time.
• Customer ID is validated to ensure the card belongs to the authenticated customer.
• Endpoint is specifically for linked/virtual cards, not physical cards.
• All operations are atomic and if the CVV update fails, the previous CVV remains valid.