Function pending_relay

crates/openshell-server/src/supervisor_session.rs:849–864

(
        sandbox_id: &str,
        relay_tx: RelayStreamSender,
        created_at: Instant,
    )

    }

    fn pending_relay(
        sandbox_id: &str,
        relay_tx: RelayStreamSender,
        created_at: Instant,
    ) -> PendingRelay {
        PendingRelay {
            sender: relay_tx,
            sandbox_id: sandbox_id.to_string(),
            relay_open: RelayOpen {
                channel_id: "ch-test".to_string(),
                target: Some(relay_open::Target::Ssh(SshRelayTarget {})),
                service_id: String::new(),
            },
            created_at,
        }
    }

    fn sandbox_principal(sandbox_id: &str) -> Principal {
        Principal::Sandbox(SandboxPrincipal {