- C-02: flush invitations before creating notifications so invitation_id
is available in notification data; eliminates extra pending fetch
- C-03: skip RSVP notification when status hasn't changed
- C-01: add defensive comments on update/delete endpoints
- W-01: add ge=1, le=2147483647 per-element validation on user_ids
- W-04: deduplicate invited_event_ids query via get_invited_event_ids()
- W-06: replace Python False with sa_false() in or_() clauses
- Frontend: extract resolveInvitationId helper, prefer data.invitation_id
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>