fix: Messaging error/validation messages

module/Olcs/src/Form/Model/Fieldset/Conversation.php

@@ -36,8 +36,14 @@ class Conversation
     public ?DynamicSelect $messageSubject = null;
 
     /**
-     * @Form\Attributes({"class": "extra-long", "id": ""})
-     * @Form\Options({"label": "Message"})
+     * @Form\Attributes({
+     *     "class": "extra-long",
+     *     "id": "",
+     *     "maxlength": 1000
+     * })
+     * @Form\Options({
+     *     "label": "You can enter up to 1000 characters",
+     * })
      * @Form\Type(Textarea::class)
      * @Form\Filter(StringTrim::class)
      * @Form\Validator("Laminas\Validator\NotEmpty",