jwk.Set drops top-level fields other than "keys" when parsing

jwk.Set drops top-level fields other than "keys" when parsing: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). I'm consuming a JWKS document that, in addition to the keys array, has a few extra top-level fields that our auth team uses for bookkeeping. A trimmed…

The task

I'm consuming a JWKS document that, in addition to the `keys` array, has a few extra top-level fields that our auth team uses for bookkeeping. A trimmed example:

Part of FineEnvs/MiMo-V2.6-RL-harbor-code.