Bump to Pydantic 2

[charlesbmi]

Describe the new feature or enhancement

Please provide a clear and concise description of what you want to add or change. We use PyDantic for YAML validation. PyDantic has released version 2 and this is now the recommended API.

Please describe how you would use this new feature.

• Faster data validation, simpler API

Describe your proposed implementation

• Use the bump-pydantic tool described at: https://docs.pydantic.dev/latest/migration/
• Then resolve any issues

Describe possible alternatives

• Stick with PyDantic 1.10. Less work in the short-term, but potentially issues in the long-term