RenewalReminderCron

Daily cron job that sends renewal reminder emails to built-in membership subscribers whose billing period ends within a configurable window. Ships in feature/built-in-membership-portal-emails. Registered on the WordPress daily schedule under benecaster_renewal_reminder_cron. Per-show configuration controls the reminder window (default 7 days, range 1–30) and a toggle to suppress reminders. Excludes subscribers who have cancelled or are in past_due status.