Allow n+1s caused by avatar fetches on the project dashboard. See...

Allow n+1s caused by avatar fetches on the project dashboard. See https://gitlab.com/gitlab-org/gitlab-ce/issues/38261

app/models/repository.rb

@@ -534,10 +534,13 @@ class Repository
   cache_method :tag_count, fallback: 0
 
   def avatar
+    # n+1: https://gitlab.com/gitlab-org/gitlab-ce/issues/38327
+    Gitlab::GitalyClient.allow_n_plus_1_calls do
       if tree = file_on_head(:avatar)
         tree.path
       end
     end
+  end
   cache_method :avatar
 
   def readme