Fix n+1 query for bookmarks on statuses (#12494)

app/presenters/status_relationships_presenter.rb

@@ -1,7 +1,8 @@
 # frozen_string_literal: true
 
 class StatusRelationshipsPresenter
-  attr_reader :reblogs_map, :favourites_map, :mutes_map, :pins_map
+  attr_reader :reblogs_map, :favourites_map, :mutes_map, :pins_map,
+              :bookmarks_map
 
   def initialize(statuses, current_account_id = nil, **options)
     if current_account_id.nil?

app/serializers/rest/status_serializer.rb

@@ -95,8 +95,8 @@ class REST::StatusSerializer < ActiveModel::Serializer
   end
 
   def bookmarked
-    if instance_options && instance_options[:bookmarks]
+    if instance_options && instance_options[:relationships]
-      instance_options[:bookmarks].bookmarks_map[object.id] || false
+      instance_options[:relationships].bookmarks_map[object.id] || false
     else
       current_user.account.bookmarked?(object)
     end