fix: change where TaskHandle is borrowed to prevent repeat output fetches

examples/data_pipeline.rs

@@ -190,31 +190,33 @@ async fn main() {
     // Stage 2: Data transformation (with stateful tasks)
     let transformed_1 = dag
         .add_task(DataTransformer::new(1.5))
-        .depends_on(raw_value_1);
+        .depends_on(&raw_value_1);
 
     let transformed_2 = dag
         .add_task(DataTransformer::new(2.0))
-        .depends_on(raw_value_2);
+        .depends_on(&raw_value_2);
 
     let transformed_3 = dag
         .add_task(DataTransformer::new(0.5))
-        .depends_on(raw_value_3);
+        .depends_on(&raw_value_3);
 
     // Stage 3: Statistical analysis (parallel operations on transformed data)
     let sum = dag
         .add_task(ComputeSum)
-        .depends_on((transformed_1, transformed_2, transformed_3));
+        .depends_on((&transformed_1, &transformed_2, &transformed_3));
 
     let product =
         dag.add_task(ComputeProduct)
-            .depends_on((transformed_1, transformed_2, transformed_3));
+            .depends_on((&transformed_1, &transformed_2, &transformed_3));
 
     let max = dag
         .add_task(FindMax)
-        .depends_on((transformed_1, transformed_2, transformed_3));
+        .depends_on((&transformed_1, &transformed_2, &transformed_3));
 
     // Stage 4: Final report
-    let report = dag.add_task(GenerateReport).depends_on((sum, product, max));
+    let report = dag
+        .add_task(GenerateReport)
+        .depends_on((&sum, &product, &max));
 
     // Execute the pipeline
     println!("Executing pipeline...\n");
@@ -224,5 +226,5 @@ async fn main() {
         .unwrap();
 
     // Print final report
-    println!("{}", output.get(report).unwrap());
+    println!("{}", output.get(report));
 }