refactor: move task_fn into its own crate

benches/comparisons/deep_chain.rs

@@ -13,7 +13,8 @@ pub fn bench_deep_chain(c: &mut Criterion) {
     group.bench_function("dagx", |b| {
         b.iter(|| {
             rt.block_on(async {
-                use dagx::{task_fn, DagRunner};
+                use dagx::DagRunner;
+                use dagx_test::task_fn;
 
                 let dag = DagRunner::new();
 

benches/comparisons/diamond_pattern.rs

@@ -13,7 +13,8 @@ pub fn bench_diamond_pattern(c: &mut Criterion) {
     group.bench_function("dagx", |b| {
         b.iter(|| {
             rt.block_on(async {
-                use dagx::{task_fn, DagRunner};
+                use dagx::DagRunner;
+                use dagx_test::task_fn;
 
                 let dag = DagRunner::new();
 

benches/comparisons/etl_pipeline.rs

@@ -12,7 +12,8 @@ pub fn bench_etl_pipeline(c: &mut Criterion) {
     group.bench_function("dagx", |b| {
         b.iter(|| {
             rt.block_on(async {
-                use dagx::{task_fn, DagRunner};
+                use dagx::DagRunner;
+                use dagx_test::task_fn;
 
                 let dag = DagRunner::new();
 

benches/comparisons/large_scale.rs

@@ -14,7 +14,8 @@ pub fn bench_large_scale(c: &mut Criterion) {
     group.bench_function("dagx", |b| {
         b.iter(|| {
             rt.block_on(async {
-                use dagx::{task_fn, DagRunner};
+                use dagx::DagRunner;
+                use dagx_test::task_fn;
 
                 let dag = DagRunner::new();
                 for i in 0..10_000 {

benches/comparisons/linear_pipeline.rs

@@ -12,7 +12,8 @@ pub fn bench_linear_pipeline(c: &mut Criterion) {
     group.bench_function("dagx", |b| {
         b.iter(|| {
             rt.block_on(async {
-                use dagx::{task_fn, DagRunner};
+                use dagx::DagRunner;
+                use dagx_test::task_fn;
 
                 let dag = DagRunner::new();
 

benches/comparisons/wide_fanout.rs

@@ -13,7 +13,8 @@ pub fn bench_wide_fanout(c: &mut Criterion) {
     group.bench_function("dagx", |b| {
         b.iter(|| {
             rt.block_on(async {
-                use dagx::{task_fn, DagRunner};
+                use dagx::DagRunner;
+                use dagx_test::task_fn;
 
                 let dag = DagRunner::new();
                 let source: TaskHandle<_> = dag.add_task(task_fn::<(), _, _>(|_: ()| 42)).into();