Recurring renewals with automatic retry handling

Subscriptions now renew on schedule, and failed payments are retried automatically before a subscription is interrupted.

A declined card shouldn't switch off a customer's service. Claddio's renewals now include retry handling: when a renewal payment fails, it's retried on a schedule while the customer is given a chance to update their payment method.

Renewal status is visible to both the customer and the team that manages their account.