Merge pull request #8439 from tchak/fix-graphql-dossier-n+1

fix(graphql): n+1 on single dossier loading

app/graphql/types/query_type.rb

@@ -38,11 +38,12 @@ module Types
     end
 
     def dossier(number:)
-      if context.internal_use?
+      dossier = if context.internal_use?
         Dossier.state_not_brouillon.for_api_v2.find(number)
       else
         Dossier.visible_by_administration.for_api_v2.find(number)
       end
+      DossierPreloader.load_one(dossier)
     rescue => e
       raise GraphQL::ExecutionError.new(e.message, extensions: { code: :not_found })
     end