WhatsApp template status updated event

Fired when Meta finishes (re)reviewing a WhatsApp Business template attached to a connected WABA. Forwarded from Meta's message_template_status_update webhook field on the WhatsApp Business Account. Consumers branch on template.status (APPROVED, REJECTED, PENDING, PAUSED, DISABLED, IN_APPEAL, PENDING_DELETION). Meta does not include the previous status or the template's category in this event.