DictNestedField field wrongly inited

[Frankkkkk]

Models using DictNestedField fields are wrongly inited and can't be used for writing:

Example (from XXX):

class Score(pykorm.models.Nested):
    exterior: int = pykorm.fields.DataField('exterior')
    delicious: int = pykorm.fields.DataField('delicious', 10)


@pykorm.k8s_custom_object('pykorm.infomaniak.com', 'v1', 'peaches')
class Peach(pykorm.NamespacedModel):
    variety: str = pykorm.fields.Spec('variety', default='default-variety')
    price: str = pykorm.fields.Spec('price', default=1)
    colours: list = pykorm.fields.Spec('colours', default=[])
    score: Score = pykorm.fields.DictNestedField(Score, path=['spec', 'score'])

Results in the following error when writing to p.score.delicious:

>       p.score.exterior = 42
E       AttributeError: 'NoneType' object has no attribute 'exterior'