Provide interface for adding other metadata besides "metrics"

[jsnb-devoted]

I'm currently working on a migration from MLFlow and a model that we use logs parameters via the log_param method. It seems like I have to resort to logging the params as a artifact file because the SDK seems to only support logging "metrics" as metadata:

class ModelVersionMetadataSchema(TypedDict):
    metrics: NotRequired[dict[str, Any]]

Is there any plans to allow for arbitrary schemas of information in the metadata section? The params I'm looking to log are a simple dictionary. Params being a built in concept like MLFlow has would be nice but an all purpose interface would be fine too.