services_core/app/Models/NotificationDelivery.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class NotificationDelivery extends Model
{
    protected $guarded = ['id'];

    protected function casts(): array
    {
        return [
            'provider_response' => 'array', 'queued_at' => 'datetime', 'sent_at' => 'datetime',
            'delivered_at' => 'datetime', 'read_at' => 'datetime', 'failed_at' => 'datetime',
            'next_retry_at' => 'datetime',
        ];
    }

    public function message()
    {
        return $this->belongsTo(NotificationMessage::class, 'notification_message_id');
    }

    public function channelConfig()
    {
        return $this->belongsTo(NotificationChannel::class, 'notification_channel_id');
    }
}