auth/gateway, auth/users, and test/example-service were referencing images without a registry prefix, causing k8s to fall back to Docker Hub (which doesn't have these images). Also generalises the gitea-registry imagePullSecret to all app namespaces (auth, finance, home, test) via a for_each in Terraform. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>