make verify-notifications brings the stack up, seeds a published BIG zaaktype, and
asserts a zaak-create notification is delivered to a webhook-sink abonnement. The
sink + driver run as containers inside the compose network and reach OpenZaak/NRC by
container IP (the runner can't reach published ports, and a single-label host isn't
URL-valid). The sink enforces a bearer token because NRC refuses an unauthenticated
callback. New 'notifications' Gitea Actions job runs it (Docker-only).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>