fix backend CORS: add global CORS filter and catch-all OPTIONS route; fix MySQL insert errors: set updatedField to empty string instead of null in models without updated_at column

app/Config/Filters.php

@@ -73,6 +73,7 @@ class Filters extends BaseFilters
      */
     public array $globals = [
         'before' => [
+            'cors',
             // 'honeypot',
             // 'csrf',
             // 'invalidchars',