feat: limit room remarks field to 200 characters to align with buspro

src/Form/Service/ParticipantFieldOptionsProvider.php

@@ -487,6 +487,7 @@ class ParticipantFieldOptionsProvider extends AbstractFieldOptionsProvider
             'sanitize_html' => true,
             'attr' => [
                 'rows' => 2,
+                'maxlength' => 200,
             ],
         ];