chore: relax pydantic requirements

[djs0109]

closes #387

[djs0109]

There is an update of the create_model since pydantic 2.8 (https://github.com/pydantic/pydantic/releases/tag/v2.8.0), which break the fucntion create_context_entity_model in filip. We need to make sure after the dependency relax, our codes work for both pydantic <2.8 and ==2.8

[tstorek]

@djs0109 Could you please elaborate on the error. I am pretty packed right now, but maybe we can check next week.
From a quick glance the type-hint should not impact the model creation. Most likely it is only a small thing. :)

[djs0109]

In pydantic 2.8 They changed

def create_model(  # noqa: C901
    __model_name: str,
    *,
...

to

def create_model(  # noqa: C901
    model_name: str,
    *,
...

So I have to change to use a positional argument to pass the model_name. It is not the most elegant solution, but it should work