post
https://kigo-core-server-stage.kigodigital.net/api/v1/accounts/log-in/sso/apple
Decodes and validates an Apple id_token, creates the account on first login
or signs in an existing one (resolved by Apple sub first, then email), and
returns an AccountSpaceApiSession access + refresh token pair. Mirrors the
legacy POST /accounts/log-in/sso/apple behavior, differing only in the
issued token type.