Download images for sources (#96)

* [WIP] hooked up photo downloading to source metadata worker

* Added new attributes for source images

* Added option to profile form

priv/repo/migrations/20240319200823_add_source_photos_fields.exs

@@ -0,0 +1,15 @@
+defmodule Pinchflat.Repo.Migrations.AddSourcePhotosFields do
+  use Ecto.Migration
+
+  def change do
+    alter table(:sources) do
+      add :fanart_filepath, :string
+      add :poster_filepath, :string
+      add :banner_filepath, :string
+    end
+
+    alter table(:media_profiles) do
+      add :download_source_images, :boolean, default: false, null: false
+    end
+  end
+end