Eager load the namespace and route of a project in project_reference_filter.rb

lib/banzai/filter/project_reference_filter.rb

@@ -70,7 +70,8 @@ module Banzai
       # The keys of this Hash are the project paths, the values the
       # corresponding Project objects.
       def projects_hash
-        @projects ||= Project.where_full_path_in(projects)
+        @projects ||= Project.eager_load(:namespace, :route)
+                             .where_full_path_in(projects)
                              .index_by(&:full_path)
                              .transform_keys(&:downcase)
       end