Issue: Offline data retrieval during FIDO2 multichallenge enrollment

Issue: Offline data retrieval during FIDO2 multichallenge enrollment: a task in LegoFlow-SWE (Harbor dataset). Currently, when a FIDO2 token is enrolled via the enroll via multichallenge endpoint, the response does not include offline authentication data, even when the enrollment is successful…

The task

Currently, when a FIDO2 token is enrolled via the `enroll_via_multichallenge` endpoint, the response does not include offline authentication data, even when the enrollment is successful. This forces clients to perform a separate `verify_fido2_challenge` call after enrollment to obtain the offline credentials, adding…

Part of Lego-X/LegoFlow-SWE.