refactor(scripts): consolidate the Polars version-matrix fork onto the engine-neutral core - #2920

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No file matched to [/home/runner/work/benchbox/benchbox/**/*requirements*.txt,/home/runner/work/benchbox/benchbox/**/*requirements*.in,/home/runner/work/benchbox/benchbox/**/*constraints*.txt,/home/runner/work/benchbox/benchbox/**/*constraints*.in,/home/runner/work/benchbox/benchbox/**/pyproject.toml,/home/runner/work/benchbox/benchbox/**/uv.lock,/home/runner/work/benchbox/benchbox/**/*.py.lock]. The cache will never get invalidated. Make sure you have checked out the target repository and configured the cache-dependency-glob input correctly.