update: Implement cancellation notification using mpsc::channel

llm-worker/examples/worker_cancel_demo.rs

@@ -30,10 +30,10 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     println!("🚀 Starting Worker...");
     println!("💡 Will cancel after 2 seconds\n");
 
-    // キャンセルトークンを先に取得（ロックを保持しない）
-    let cancel_token = {
+    // キャンセルSenderを先に取得（ロックを保持しない）
+    let cancel_tx = {
         let w = worker.lock().await;
-        w.cancellation_token().clone()
+        w.cancel_sender()
     };
 
     // タスク1: Workerを実行
@@ -43,10 +43,10 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
         println!("📡 Sending request to LLM...");
 
         match w.run("Tell me a very long story about a brave knight. Make it as detailed as possible with many paragraphs.").await {
-            Ok(WorkerResult::Finished(_)) => {
+            Ok(WorkerResult::Finished) => {
                 println!("✅ Task completed normally");
             }
-            Ok(WorkerResult::Paused(_)) => {
+            Ok(WorkerResult::Paused) => {
                 println!("⏸️  Task paused");
             }
             Err(e) => {
@@ -59,7 +59,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     tokio::spawn(async move {
         tokio::time::sleep(Duration::from_secs(2)).await;
         println!("\n🛑 Cancelling worker...");
-        cancel_token.cancel();
+        let _ = cancel_tx.send(()).await;
     });
 
     // タスク完了を待つ