Allow heading tags (h1-h6) in ContentSanitizer so news editor headings render

app/Services/Enhance/EnhanceProcessor.php

@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Services\Enhance;
+
+use App\Models\EnhanceJob;
+
+interface EnhanceProcessor
+{
+    public function process(EnhanceJob $job): EnhanceProcessorResult;
+}