[Enhancement] Add option for a source to only use cookies when needed (#640)

* Updated model with new attribute

* Update app logic to use new cookie logic

* lots of tests

* Updated UI and renamed attribute

* Updated tests

lib/pinchflat/metadata/metadata_file_helpers.ex

@@ -9,6 +9,7 @@ defmodule Pinchflat.Metadata.MetadataFileHelpers do
   needed
   """
 
+  alias Pinchflat.Sources
   alias Pinchflat.Utils.FilesystemUtils
 
   alias Pinchflat.YtDlp.Media, as: YtDlpMedia
@@ -66,7 +67,7 @@ defmodule Pinchflat.Metadata.MetadataFileHelpers do
     yt_dlp_filepath = generate_filepath_for(media_item_with_preloads, "thumbnail.%(ext)s")
     real_filepath = generate_filepath_for(media_item_with_preloads, "thumbnail.jpg")
     command_opts = [output: yt_dlp_filepath]
-    addl_opts = [use_cookies: media_item_with_preloads.source.use_cookies]
+    addl_opts = [use_cookies: Sources.use_cookies?(media_item_with_preloads.source, :metadata)]
 
     case YtDlpMedia.download_thumbnail(media_item_with_preloads.original_url, command_opts, addl_opts) do
       {:ok, _} -> real_filepath