add basic device create process

device-app/app/Models/Device.php

@@ -17,5 +17,8 @@ class Device extends Model
      * @var string
      */
     protected $primaryKey = 'device_id';
+
+    protected $fillable = ['device_id', 'title', 'device_type', 'description', 'accessories', 'rz_username_buyer', 'serial_number', 'image_url'];
+
     use HasFactory;
 }