Caramel-CRM/app/Providers/EventServiceProvider.php

<?php

namespace App\Providers;

use Illuminate\Foundation\Support\Providers\EventServiceProvider as ServiceProvider;
use Illuminate\Support\Facades\Schedule;
use Illuminate\Support\Facades\Event;
use Illuminate\Support\Facades\Schema;
use Illuminate\Routing\Events\RouteMatched;
use App\Models\Setting;
use App\Listeners\ScheduleListener;
use App\Jobs\CheckInvoiceDueDatesJob;

class EventServiceProvider extends ServiceProvider
{
    protected $listen = [];

    /**
     * Bootstrap services.
     */
    public function boot(): void
    {
        parent::boot();

        if (Schema::hasTable('settings')) {
            $method = Setting::where('key', 'app.schedule_method')->value('value') ?? 'internal';
            if ($method === 'internal') {
                Event::listen(RouteMatched::class, [ScheduleListener::class, 'handle']);
            }
        }

        // TODO: read where to put these
        // it seems to work here, but where is the apropriate place?
        // Kernel::schedule did not work
        Schedule::command('caldav:sync')
            ->everyMinute()
            ->withoutOverlapping();

        Schedule::job(new CheckInvoiceDueDatesJob())
            ->daily()
            ->withoutOverlapping();
    }
}