Optimize: association loading for RepositoryController

Vasilii Iakliushinrequested to merge
482942_preload_associations into master

What does this MR do and why?

Contriubtes to #482942 (closed)

Problem

Protected branches and tags have associations that we use without preloading. It leads to N+1 queries problem.

Solution

Explicitly preload relations

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Screenshot_2024-10-15_at_15.15.37 Screenshot_2024-10-15_at_15.11.47

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