feat: 利用 etag 节省内容传输，显式写明生命周期 (#464)

crates/bili_sync/src/utils/task_notifier.rs

@@ -42,7 +42,7 @@ impl TaskStatusNotifier {
         }
     }
 
-    pub async fn start_running(&self) -> MutexGuard<()> {
+    pub async fn start_running(&'_ self) -> MutexGuard<'_, ()> {
         let lock = self.mutex.lock().await;
         let _ = self.tx.send(Arc::new(TaskStatus {
             is_running: true,