TextChoices are not rendered as enum when a field is not editable

[rixx]

Describe the bug

When I switch a model field from editable=True to editable=False, the documentation correctly still lists the field in reading (list, retrieve, etc) views, but stops including the enum.

To Reproduce

class TestChoices(models.TextChoices):
    TEST = "test"

class TestModel(models.Model):
    test_role = models.CharField(choices=TestChoices.choices, max_length=4, null=True, default=None, editable=True)

class TestModelSerializer(serializers.ModelSerializer)
    class Meta:
        model = TestModel
        fields = ("id", "test_role")

Generate a schema, observe the enum present, then switch the test_role field to editable=False and see the enum disappear.

I tried turning COMPONENT_SPLIT_REQUEST off, which I usually have on, but the setting doesn’t make a difference (not that it should, just reporting this attempt for completeness).