Move error tracker notifier files to correct namespace

lib/error_tracker/error_notifier.ex

@@ -1,10 +1,10 @@
-defmodule MusicLibrary.ErrorNotifier do
+defmodule ErrorTracker.ErrorNotifier do
   @moduledoc false
 
   use GenServer
   require Logger
 
-  alias MusicLibrary.ErrorNotifier.Email
+  alias ErrorTracker.ErrorNotifier.Email
 
   @cleanup_interval :timer.minutes(5)
 

lib/error_tracker/error_notifier/email.ex

@@ -1,4 +1,4 @@
-defmodule MusicLibrary.ErrorNotifier.Email do
+defmodule ErrorTracker.ErrorNotifier.Email do
   @moduledoc false
 
   import Swoosh.Email
@@ -134,6 +134,6 @@ defmodule MusicLibrary.ErrorNotifier.Email do
   end
 
   defp config do
-    Application.get_env(:music_library, MusicLibrary.ErrorNotifier, [])
+    Application.get_env(:music_library, ErrorTracker.ErrorNotifier, [])
   end
 end

lib/music_library/application.ex

@@ -13,7 +13,7 @@ defmodule MusicLibrary.Application do
     _ = Req.RateLimiter.new()
 
     children = [
-      MusicLibrary.ErrorNotifier,
+      ErrorTracker.ErrorNotifier,
       MusicLibrary.Vault,
       MusicLibrary.Repo,
       MusicLibrary.BackgroundRepo,