`registry::run` now accepts an `Option<PathBuf>` config override so the umbrella binary's `--config` flag (and its clap-bound `MAESTRO_CONFIG` env var) reach the registry, mirroring how the daemon already consumed the override.
`registry::run` now accepts an `Option<PathBuf>` config override so the umbrella binary's `--config` flag (and its clap-bound `MAESTRO_CONFIG` env var) reach the registry, mirroring how the daemon already consumed the override.