Update tests, examples, benches

examples/complex_dag.rs

@@ -67,6 +67,7 @@
 //! ```
 
 use dagx::{task, DagResult, DagRunner, Task};
+use futures::FutureExt;
 
 // Extract: Load data from different sources
 struct LoadData {
@@ -201,10 +202,7 @@ async fn main() -> DagResult<()> {
 
     // Execute the entire ETL pipeline
     println!("Executing pipeline...\n");
-    dag.run(|fut| {
-        tokio::spawn(fut);
-    })
-    .await?;
+    dag.run(|fut| tokio::spawn(fut).map(Result::unwrap)).await?;
 
     // Display final report
     println!("\n{}", dag.get(report)?);