Search score refactor

[kaspth]

Also adds a score_for method to extract scores for individual attributes then.

A version discussed in https://gist.github.com/kaspth/54c2541309704e054bca2be5ace3ebee

Pull request checklist

• My code contains tests covering the code I modified
• I linted and tested the project with bin/check
• I added significant changes and product updates to the changelog

[joemasilotti]

Thanks for this @kaspth!