Invitations store an optional invitee name (trimmed, up to 200 characters) and
personal note (line breaks kept, up to 2,000). Both reach onSendInvitation; the
name is returned by the invitation listing. Organizations migration 0002 adds
the columns. Release 0.91.0.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>