Major upgrade to pydantic 2.0

[pcrespov]

Planned changes

• Migrate to pydantic >=2.0. See https://docs.pydantic.dev/latest/migration/
• Migrate to fastapi >=0.100 (has ported functionality)

Major upgrade not out-of-the box and requires some coordination. This upgrade will bring substantial speedup to the code. It would be desirable to measure the improvement. Should we setup some type of benchmark?

Both libraries have been releases so I added a constraint in requirements/constraints.txt

We should start testing first the upgrade with the packages and then when we understand the migration mechanisms we can do the rest of the repository.

Tasks

Beta Give feedback

1. migrate settings-library, specially CustomBaseSettings @pcrespov
2. migrate models-library

This is a sub issue from ITISFoundation/osparc-issues#675

Sundae

Beta Give feedback

1. explore the migration path @pcrespov

[sanderegg]

@pcrespov explore the migration path

[giancarloromeo]

This article contains useful tips on how to approach the migration: https://medium.com/codex/migrating-to-pydantic-v2-5a4b864621c3

[giancarloromeo]

FastAPI doesn't support a mix of pydantic version. The installed one determines the models version and so on.

See: fastapi/fastapi#10360

We will proceed updating the libraries/services one by one. 🤞