Understand why simple steps get high difficulty
It's weird that jobs like `split-is-valid` and `config-duckdb-index-size`, which are very simple, get a high difficulty value.

<img width="476" alt="Capture d’écran 2024-02-27 à 10 01 10" src="https://github.com/huggingface/datasets-server/assets/1676121/0c69cadd-78a0-4478-a37f-5abff642627d">

Understand why simple steps get high difficulty: It's weird that jobs like `split-is-valid` and `config-duckdb-index-size`, which are very simple, get a high difficulty value.

<img width="476" alt="Capture d’écran 2024-02-27 à 10 01 10" src="https://github.com/huggingface/datasets-server/assets/1676121/0c69cadd-78a0-4478-a37f-5abff642627d">
