refactor: resolve CLI redundancy and overlapping transport state bounds

stub/src/main.rs

@@ -19,7 +19,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     let cli = Cli::parse();
     let rt = tokio::runtime::Runtime::new()?;
     rt.block_on(async {
-        let (msg_tx, mut msg_rx) = mpsc::channel::<String>(100);
+        let (msg_tx, msg_rx) = mpsc::channel::<String>(100);
         let (shutdown_tx, mut shutdown_rx) = mpsc::channel::<()>(1);
 
         tokio::spawn(async move {