subscription-lifecycle

Covers everything after the subscription is created — trials, proration on upgrade and downgrade, dunning and retry schedules, grace periods, involuntary churn from expired cards, cancellation timing, and the bank-mandate lifecycle for SEPA, Bacs, PAD, UPI AutoPay and Pix Automatico. Also covers the stored-credential framework and the network transaction id that recurring charges must carry. This is the part every…