[Enhancement] Add rate limiting to yt-dlp requests; prevent saving Media Items when throttled by YouTube (#559)

* Added sleep interval to settings

* Added new sleep setting to yt-dlp runner and added tests

* Added setting for form; updated setting name

* Updated form label

* Prevented saving/updating of media items if being throttled by youtube

* Added the bot message to the list of non-retryable errors

* Fixed typo

test/pinchflat/settings_test.exs

@@ -77,5 +77,13 @@ defmodule Pinchflat.SettingsTest do
 
       assert %Ecto.Changeset{} = Settings.change_setting(setting, %{onboarding: true})
     end
+
+    test "ensures the extractor sleep interval is positive" do
+      setting = Settings.record()
+
+      assert %Ecto.Changeset{valid?: true} = Settings.change_setting(setting, %{extractor_sleep_interval_seconds: 1})
+      assert %Ecto.Changeset{valid?: true} = Settings.change_setting(setting, %{extractor_sleep_interval_seconds: 0})
+      assert %Ecto.Changeset{valid?: false} = Settings.change_setting(setting, %{extractor_sleep_interval_seconds: -1})
+    end
   end
 end