build-module-runtime.sh adds psql to the postgres image and mc to the minio image (their clients shell out to those). provider-on-backend-network asserts redis's runtime, on the backend's private network, binds the broker via NAT and provisions a consumer with the mesh's credential — the shape the committed provider manifests use. Claude-Session: https://claude.ai/code/session_01LrgweAeERJYBg88c5cKDzF