gto does not work in 3.14

[skshetry]

This is because pydantic v1 API is not supported on Python 3.14 and is not going to be supported as per the maintainer. See pydantic/pydantic#11613 (comment).

Traceback

./dvc/tests/func/artifacts/test_artifacts.py:246: in make_artifact
    tmp_dir.dvc.artifacts.add(name, artifact, dvcfile=os.fspath(dvcfile))
./dvc/repo/artifacts.py:115: in add
    check_name_format(name)
./dvc/repo/artifacts.py:30: in check_name_format
    from gto.constants import assert_name_is_valid
.venv/lib/python3.14/site-packages/gto/__init__.py:1: in <module>
    import gto.log  # noqa
    ^^^^^^^^^^^^^^
.venv/lib/python3.14/site-packages/gto/log.py:7: in <module>
    from gto.config import CONFIG
.venv/lib/python3.14/site-packages/gto/config.py:8: in <module>
    from gto.constants import assert_name_is_valid
.venv/lib/python3.14/site-packages/gto/constants.py:88: in <module>
    class Shortcut(BaseModel):
.venv/lib/python3.14/site-packages/pydantic/v1/main.py:221: in __new__
    inferred = ModelField.infer(
.venv/lib/python3.14/site-packages/pydantic/v1/fields.py:504: in infer
    return cls(
.venv/lib/python3.14/site-packages/pydantic/v1/fields.py:434: in __init__
    self.prepare()
.venv/lib/python3.14/site-packages/pydantic/v1/fields.py:544: in prepare
    self._set_default_and_type()

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = ModelField(name='stage', type=UndefinedType, required=False, default=None)

    def _set_default_and_type(self) -> None:
        """
        Set the default value, infer the type if needed and check if `None` value is valid.
        """
        if self.default_factory is not None:
            if self.type_ is Undefined:
                raise errors_.ConfigError(
                    f'you need to set the type of field {self.name!r} when using `default_factory`'
                )
            return

        default_value = self.get_default()

        if default_value is not None and self.type_ is Undefined:
            self.type_ = default_value.__class__
            self.outer_type_ = self.type_
            self.annotation = self.type_

        if self.type_ is Undefined:
>           raise errors_.ConfigError(f'unable to infer type for attribute "{self.name}"')
E           pydantic.v1.errors.ConfigError: unable to infer type for attribute "stage"