Make the id from result model in Django an UUID

More info [here](https://docs.djangoproject.com/en/3.1/ref/models/fields/#uuidfield)

```python
import uuid
from django.db import models

class MyUUIDModel(models.Model):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    # other fields
```