fix: episode id not being added when monitor downloads episode

src/Base/Util/EpisodeId.php

@@ -0,0 +1,12 @@
+<?php
+
+namespace App\Base\Util;
+
+class EpisodeId
+{
+    public static function fromSeasonEpisodeNumbers(int $season, int $episode): string
+    {
+        return "S". str_pad($season, 2, "0", STR_PAD_LEFT) .
+            "E". str_pad($episode, 2, "0", STR_PAD_LEFT);
+    }
+}