Instrument MergeRequest#ensure_ref_fetched
What does this MR do?
It instruments ensure_ref_fetched for merge requests
Are there points in the code the reviewer needs to double check?
Why was this MR needed?
We need this in order to validate changes suggested in #36061 (closed) make sense
Screenshots (if relevant)
Does this MR meet the acceptance criteria?
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Changelog entry added, if necessary -
Documentation created/updated -
API support added -
Tests added for this feature/bug - Review
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Has been reviewed by UX -
Has been reviewed by Frontend -
Has been reviewed by Backend -
Has been reviewed by Database
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Conform by the merge request performance guides -
Conform by the style guides -
Squashed related commits together