Merge branch 'sh-enable-ref-caching-diffs-controller' into 'master'

Enable ref name caching for merge request diffs

Closes #217192

See merge request gitlab-org/gitlab!31530

app/controllers/projects/merge_requests/diffs_controller.rb

@@ -9,6 +9,8 @@ class Projects::MergeRequests::DiffsController < Projects::MergeRequests::Applic
   before_action :define_diff_vars
   before_action :define_diff_comment_vars, except: [:diffs_batch, :diffs_metadata]
 
+  around_action :allow_gitaly_ref_name_caching
+
   def show
     render_diffs
   end

changelogs/unreleased/sh-enable-ref-caching-diffs-controller.yml

+---
+title: Enable ref name caching for merge request diffs
+merge_request: 31530
+author:
+type: performance