Use whenever editing the Scala cluster-tuning module under `src/main/scala/com/db/serna/orchestration/cluster_tuning/` — `single/` (the per-date tuner), `auto/` (multi-date AutoTuner), `diff/`, and the loader-side of `log_analytics/`. Triggers when the user mentions the tuner, ClusterMachineAndRecip
Use whenever editing the Scala cluster-tuning module under `src/main/scala/com/db/serna/orchestration/cluster_tuning/` — `single/` (the per-date tuner), `auto/` (multi-date AutoTuner), `diff/`, and the loader-side of `log_analytics/`. Triggers when the user mentions the tuner, ClusterMachineAndRecipeTuner, AutoTuner, machine selection, executor sizing, autoscaling policy, cost calculation (b20/b21