Instrument the Repository class

What does this MR do?

This MR instruments the Repository class.

Are there points in the code the reviewer needs to double check?

No.

Why was this MR needed?

This class wasn't instrumented.

Does this MR meet the acceptance criteria?

• CHANGELOG entry added
• Conform by the style guides
• Branch has no merge conflicts with master (if you do - rebase it please)
• Squashed related commits together