Function run_cli_version_probe 

async fn run_cli_version_probe(
    cli_version: Arc<Mutex<Option<CliVersionInfo>>>,
    update_tx: UpdateFanout,
    prober: Arc<Box<dyn Fn() -> Pin<Box<dyn Future<Output = CliVersionInfo> + Send>> + Send + Sync>>,
)

The claude version probe, off the boot path. Each result is merged into the store, which wakes the views when it changed what they draw.