[bug] moon ci doesn't work with a shallow clone

[dudicoco]

Describe the bug

When running moon ci --base HEAD~1 in CI with a shallow clone we get the following error:

[ WARN 2024-11-16 19:28:39.780] moon_app::queries::touched_files  Detected a shallow checkout, unable to run Git commands to determine touched files. 
[ WARN 19:2[8](https://github.com/.../actions/runs/11872654373/job/33086603328#step:4:9):39.780] moon_app::queries::touched_files  A full Git history is required for affected checks, falling back to an empty files list. 
Gathering touched files
  Error: app::ci::no_shallow
    × CI requires a full VCS history to operate correctly. Please avoid shallow
    │ checkouts.

I'm opening this as a bug rather than a feature request due to the fact that this error contradicts the --base flag.
If we are able to set the base to the last commit we should be able to use it with a shallow clone.
Shallow clones are critical for big monorepos due to the performance improvement they provide.