Who's who: patients, mentors, group admins, hosts, requesters

A glossary topic. Patient: owns the record and the policies. Mentor: a
group member who opted into being findable for peer support. Group admin:
runs the registry — membership and suggested policies, never your data.
Host: where a patient’s MAIA runs (any commodity cloud). Requester: anyone
asking for information — physician, researcher, another patient — whose
request your cards decide. Corrections and additions welcome; this topic
will be edited to stay current.