fix(stub): Prevent infinite reconnect loop causing port exhaustion

- Added a break statement when send_task exits (STDIN closed).
- Increased reconnect delay from 50ms to 1 second to prevent ephemeral port exhaustion when the server repeatedly drops connections.

stub/src/main.rs

@@ -117,20 +117,23 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
                     });
 
                     tokio::select! {
-                        _ = shutdown_rx.recv() => { tokio::time::sleep(tokio::time::Duration::from_millis(50)).await;
+                        _ = shutdown_rx.recv() => { 
+                            tokio::time::sleep(tokio::time::Duration::from_millis(50)).await;
                             tracing::info!("Shutdown received while connected");
-                            
+                            break;
                         }
                         _ = &mut send_task => {
                             tracing::error!("Send task exited");
-                            tokio::time::sleep(tokio::time::Duration::from_millis(50)).await; recv_task.abort();
+                            tokio::time::sleep(tokio::time::Duration::from_millis(50)).await; 
+                            recv_task.abort();
+                            break;
                         }
                         _ = &mut recv_task => {
                             tracing::error!("Recv task exited");
                             send_task.abort();
                         }
                     }
-                    tokio::time::sleep(tokio::time::Duration::from_millis(50)).await;
+                    tokio::time::sleep(tokio::time::Duration::from_secs(1)).await;
                 }
                 Err(e) => {
                     tracing::error!("Failed to connect via WSS: {}", e);