feat(api.playground): playground is accessible to anyone. allow user to fill in headers

app/controllers/graphql_controller.rb

@@ -1,14 +1,11 @@
 class GraphqlController < ApplicationController
-  before_action :authenticate_administrateur!
-
   def playground
-    procedure = current_administrateur.procedures&.last
-
-    gon.default_query = API::V2::StoredQuery.get('ds-query-v2')
+    procedure = current_administrateur&.procedures&.last
     gon.default_variables = {
-      "demarcheNumber": procedure&.id,
+      "demarcheNumber": procedure&.id || 42,
       "includeDossiers": true
     }.compact.to_json
+    gon.default_query = API::V2::StoredQuery.get('ds-query-v2')
 
     render :playground, layout: false
   end

app/javascript/entrypoints/playground.ts

@@ -24,8 +24,7 @@ function GraphiQLWithExplorer() {
     plugins: [explorer],
     query: query,
     variables: defaultVariables,
-    onEditQuery: setQuery,
-    isHeadersEditorEnabled: false
+    onEditQuery: setQuery
   });
 }