Invite people by email (bulk)

Owner or admin only. emails is an array or one string of pasted text — commas, semicolons, spaces, newlines, Name <email> and spreadsheet columns all work; tokens without @ are ignored, duplicates collapse. Up to 100 valid addresses per call (400 TOO_MANY_EMAILS beyond that — batch). New or not-yet-active people get a 7-day join link by email; people with an account are added and notified. Existing members keep their role (change roles with POST /members). Re-inviting a pending person retires their older links.