Fetch the transcript of a single V2 1:1 meeting by its id, scoped to
your company. Returns the full meeting — title, status, participants,
the complete transcript_text, AI-generated summary brief, structured
summary, collaborative document HTML, and key timestamps — the same
shape getMeeting returns.

Input:

• id (string, required) — the meeting's BSON ObjectId.

A meeting that doesn't exist in your company, or one you're not a
participant in, is reported as not found. A meeting without a
transcript is reported as having no transcript available.

Required OAuth scope: checkins:read or growth:read