Keep the legacy loop enabled (default) to run the classic mxd daemon.
Disable it with --no-default-features --features "sqlite toml" to obtain a
Wireframe-only build; the mxd binary is skipped via required-features and
server::run() invokes the Wireframe runtime.
make test-wireframe-only exercises the Wireframe-first configuration and
runs the behaviour scenarios that assert the feature gate.