Function executar_tunnel_with_client 

pub async fn executar_tunnel_with_client(
    vps_nome: &str,
    porta_local: u16,
    host_remoto: &str,
    porta_remota: u16,
    timeout_ms: u64,
    json: bool,
    cliente: Box<dyn ClienteSshTrait>,
) -> Result<()>

Versão testável do loop de tunnel.