fix: allow Debugbar to load with strict form request validation enabled

[fadez]

Laravel v13.4.0 introduced a new feature: strict mode for form request validation.

When enabled globally, this causes Debugbar assets to not load because the hash and mtime parameters are missing from the form request validation.

As a result, these requests will return a 302 status response:

• http://laravel.test/_debugbar/assets?type=css&mtime=1776531680
• http://laravel.test/_debugbar/assets?type=js&hash=1776531680

You can verify this by adding the following to app/Providers/AppServiceProvider.php:

use Illuminate\Foundation\Http\FormRequest;

public function boot(): void
{
    FormRequest::failOnUnknownFields();
}

This PR fixes the issue by adding hash and mtime as optional parameters to the AssetRequest validation rules.

[barryvdh]

Thanks!

[barryvdh]

Not sure why they are named differently though :P