ci: add uv virtual environment cache to setup-uv-project action

[davidberenstein1957]

Description

Added some caching for UV :)

Related Issue

Fixes #(issue number)

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

Additional Notes

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Cache key references gitignored uv.lock file

Medium Severity

The uv.lock file is listed in .gitignore, so it will never be present in the repository checkout. hashFiles('uv.lock', 'pyproject.toml') silently ignores missing files, so the cache key effectively only hashes pyproject.toml. This means the uv.lock reference is a no-op, and the cache won't invalidate when it otherwise would if the lock file were tracked. The same issue applies to the restore-keys line.