refactor(ci-new): extract parallel cargo check runner

Extract the duplicate parallel check logic from build-all and
clippy-all tasks into a shared `run_parallel_checks` helper.
Update renderers to set exit code instead of printing failure
counts.

1 files changed, 1 insertions, 0 deletions

diff --git a/mingling_ci/src/task.rs b/mingling_ci/src/task.rs
index 1d389b0..07ffb3f 100644
--- a/mingling_ci/src/task.rs
+++ b/mingling_ci/src/task.rs
@@ -1,2 +1,3 @@
 pub(crate) mod cmd_build;
 pub(crate) mod cmd_clippy;
+pub(crate) mod run;