script/fixes/123_refresh_media_metadata.rb: refresh metadata in parallel.

script/fixes/123_refresh_media_metadata.rb

@@ -5,8 +5,9 @@ require_relative "base"
 CurrentUser.user = User.system
 condition = ENV.fetch("COND", "TRUE")
 fix = ENV.fetch("FIX", "false").truthy?
+workers = ENV.fetch("WORKERS", 4).to_i
 
-MediaAsset.active.where(condition).find_each do |asset|
+MediaAsset.active.where(condition).parallel_each(in_processes: workers) do |asset|
   variant = asset.variant(:original)
   media_file = variant.open_file