Function fetch_topology

cake-cli/src/chat.rs:866–875

(client: &Client, server: &str)

}

async fn fetch_topology(client: &Client, server: &str) -> Result<TopologyResponse> {
    let resp = client
        .get(format!("{}/api/v1/topology", server))
        .send()
        .await?;
    if !resp.status().is_success() {
        anyhow::bail!("topology API error: {}", resp.status());
    }
    Ok(resp.json().await?)
}

// ── Main loop ──────────────────────────────────────────────────────────────