Function run_health_check 

pub async fn run_health_check(
    vps_name: Option<&str>,
    config_override: Option<PathBuf>,
    format: OutputFormat,
    json_local: bool,
    password_override: Option<String>,
    timeout_override: Option<u64>,
    key_override: Option<String>,
    key_passphrase_override: Option<String>,
    replace_host_key: bool,
) -> Result<()>

Health-check SSH. One-shot health-check with auth parity (GAP-SSH-CLI-006) and TOFU (M1).