Stack.name contains the full absolute path from the spec file's
"stack:" key (e.g. /home/.../stacks/hyperlane-minio). K8s labels
must be <= 63 bytes and alphanumeric. Extract just the directory
basename (e.g. "hyperlane-minio") before using it as a label value.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>