Run pre-commit without the Node 20 pre-commit action - #106

@yemine0x01 thanks for tackling the Node 20 pre-commit action deprecation — this is a clean, focused fix.

What's needed

• Looks good overall: the new pre-commit-run job is already passing on CI, which validates the swap away from pre-commit/action@v3.0.1, and the cache key on .pre-commit-config.yaml is sensible.
• Just wait for pytests / dynamic-pytests to go green — they're still pending (and are unrelated to this workflow-only change, so no action expected on your end unless one fails).
• Process nudge, per CONTRIBUTING: add Alban Puech as a reviewer.

No code/test/docs changes apply here since this is a CI workflow tweak. I'll defer the merge call to a maintainer.