Backwards-incompatible API change in OAuth2Validator in 1.6.0

Backwards-incompatible API change in OAuth2Validator in 1.6.0: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). PR 967 changed the API for OAuth2Validator.get additional claims in a backwards-incompatible way (and the project major version has not been bumped, which…