chore: further cleanup and refactor

src/Model/BookingEditSubmissionResult.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Model;
+
+final readonly class BookingEditSubmissionResult
+{
+    public const string STATUS_BOOKING_DATA_RELOAD_FAILED = 'booking_data_reload_failed';
+    public const string STATUS_NOTIFICATION_ERROR = 'notification_error';
+    public const string STATUS_NOTIFICATION_INFO = 'notification_info';
+    public const string STATUS_SUCCESS = 'success';
+    public const string STATUS_UNSUCCESSFUL = 'unsuccessful';
+    public const string STATUS_TIMEOUT = 'timeout';
+    public const string STATUS_API_CLIENT_ERROR = 'api_client_error';
+
+    public function __construct(
+        public string $status,
+        public ?string $message = null,
+        public bool $immutableChangesReverted = false,
+    ) {
+    }
+}