When a flight is set to CONFIRMED, fire a TRAVEL_CONFIRMED in-app
notification (+ email via the existing NotificationEmailSetting pipeline)
to the attending member. When a visa status changes to one of
INVITATION_SENT|APPOINTMENT_BOOKED|GRANTED|DENIED, fire a
VISA_STATUS_UPDATE notification. Both are best-effort (try/catch, never
throw inside the mutation). Admin notes are not forwarded to metadata.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
