OptionalDisplayThe attendee's display name, when the calendar provides one.
The attendee's email address (the join key used to match an agent identity).
OptionalResponseResponse status, when known — used later for "the agent accepted" UX; not required to join.
One attendee on a normalized calendar invite. Platform-agnostic — Graph's
attendees[].emailAddressand Google'sattendees[].emailboth normalize to this shape.