feat: add short connect timeout

Signed-off-by: kjuulh <contact@kjuulh.io>

crates/churn/src/agent/grpc_client.rs

@@ -87,6 +87,7 @@ impl GrpcClient {
         let channel = if self.host.starts_with("https") {
             Channel::from_shared(self.host.to_owned())?
                 .tls_config(ClientTlsConfig::new().with_native_roots())?
+                .connect_timeout(std::time::Duration::from_secs(5))
                 .connect()
                 .await?
         } else {