Add Siret(TypeDe)Champ STI model

app/models/champs/siret_champ.rb

@@ -0,0 +1,4 @@
+class Champs::SiretChamp < Champ
+  belongs_to :etablissement, dependent: :destroy
+  accepts_nested_attributes_for :etablissement, allow_destroy: true, update_only: true
+end

app/models/types_de_champ/siret_type_de_champ.rb

@@ -0,0 +1,2 @@
+class TypesDeChamp::SiretTypeDeChamp < TypeDeChamp
+end

config/locales/models/type_de_champ/fr.yml

@@ -26,3 +26,4 @@ fr:
           multiple_drop_down_list: 'Menu déroulant à choix multiples'
           dossier_link: 'Lien vers un autre dossier'
           piece_justificative: 'Pièce justificative'
+          siret: 'SIRET'

spec/factories/type_de_champ.rb

@@ -75,6 +75,9 @@ FactoryBot.define do
     factory :type_de_champ_piece_justificative, class: 'TypesDeChamp::PieceJustificativeTypeDeChamp' do
       type_champ 'piece_justificative'
     end
+    factory :type_de_champ_siret, class: 'TypesDeChamp::SiretTypeDeChamp' do
+      type_champ 'siret'
+    end
 
     trait :private do
       private true