Improve score feed performance

[sdenis29]

Fixes: issue url

Changes

Fixed n+1 queries problem using eager loading instead of lazy loading by adding includes(:user) in user_feed method which fetch the users associated with their scores in one query.

Before

After

[SergiuApostuTOL]

When specifying the issue url, just paste the raw url in there without renaming it and Github will handle the rest, like AACraiu#1

[SergiuApostuTOL]

This is a hotfix branch, its target should be indeed main.