Function execute_node 

fn execute_node(
    plan: Arc<Plan>,
    node_index: usize,
    tx: Sender<Result<RtdlEvent, Status>>,
    atlas: AtlasClient,
    provider_id: String,
    runtime: PlanRuntime,
    verification: Arc<VerificationPolicy>,
) -> Pin<Box<dyn Future<Output = bool> + Send + 'static>>