Updated to Pydantic V2 Models

[srivarra]

Using the Pydantic V2 API instead of the v1 compatibility namespace (pydantic.v1)

Resources

• bump-pydantic
• Migration Guide

waveorder/cli/settings.py

1. MyBaseModel: Removed extra=Extra.forbid from inheritance, use model_config = ConfigDict(extra="forbid")
2. Model validators: Changed @model_validator(mode="after") from cls, values → self, use self.field instead of values.get("field"), return self
3. Field validators: Converted validators accessing other fields to @model_validator(mode="after") (e.g., na_det, warn_unit_consistency). Basically the changes make pydantic models more "dataclassy" instead of more "dictionary-y(?)"

Added a few type hints as well for the individual models where I ran into them, might not be exhaustive.