feat(codegen): add A/B test 3: channel handles in search results

codegen/src/main.rs

@@ -86,7 +86,7 @@ async fn main() {
                 }
                 None => {
                     let res = abtest::run_all_tests(n, cli.concurrency).await;
-                    println!("{}", serde_json::to_string(&res).unwrap())
+                    println!("{}", serde_json::to_string_pretty(&res).unwrap())
                 }
             };
         }