Guest Passes - Allow memberships to have guest passes

Some clubs have memberships that include “guest passes” - often to allow a guest to book into a class or appointment.

A guest pass benefit on the membership, for example set to 1/month, auto-resetting. Member taps "invite a guest" in their app → sends the guest a self-serve link to add details + sign the guest waiver → guest gets one booking credit inheriting the member's class/appointment access.