zeitwerk: move our Array extension to initializers/core_ext

app/models/procedure.rb

@@ -43,7 +43,6 @@
 #  published_revision_id               :bigint
 #  service_id                          :bigint
 #
-require Rails.root.join('lib', 'percentile')
 
 class Procedure < ApplicationRecord
   self.ignored_columns = ['archived_at', 'csv_export_queued', 'xlsx_export_queued', 'ods_export_queued']

config/initializers/core_ext.rb

@@ -0,0 +1,3 @@
+Dir[File.join(Rails.root, "lib", "core_ext", "*.rb")].each do |core_ext_file|
+  require core_ext_file
+end