refactor: Do not extract hash data for local pypi sources

[hunger]

... and add more tests, not only for this, but also for version not getting stored anymore, etc.

How Has This Been Tested?

More unit tests

AI Disclosure

• This PR contains AI-generated content.
  • I have tested any AI-generated content in my PR.
  • I take responsibility for any AI-generated content in my PR.
    Tools: Claude

Checklist:

• 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 sufficient tests to cover my changes.

[baszalmstra]

Does this also work properly when refering to a local .whl file? I dont know how those are stored.