Do not export non exportable champs on draft procedures

spec/factories/procedure.rb

@@ -193,6 +193,12 @@ FactoryBot.define do
       end
     end
 
+    trait :with_explication do
+      after(:build) do |procedure, _evaluator|
+        build(:type_de_champ_explication, procedure: procedure)
+      end
+    end
+
     trait :published do
       after(:build) do |procedure, _evaluator|
         procedure.path = generate(:published_path)