Extend Monitor to add a raw_url attribute

LinkMonitor.php

class LinkMonitor extends Monitor
{
    protected $table = 'monitors';

    protected $appends = ['raw_url'];

    /**
     * @return string
     */
    public function getRawUrlAttribute()
    {
        if (! isset($this->attributes['url'])) {
            return;
        }
        return $this->attributes['url'];
    }
}