infrastructure-pydantic-upgrade-class-based-configuration-in-pydantic-models-trigg-e938e4f2

THEN Replace the inner Config class with a `model_config` attribute using `ConfigDict`. Remove the deprecated `class Config` and define `model_config = ConfigDict(...)` inside the model class to comply with Pydantic V2+.

from pydantic import BaseModel, ConfigDict
class MyModel(BaseModel):
    model_config = ConfigDict(arbitrary_types_allowed=True)
    # fields...