transientData

Optional runtime-only attachment for application state.

This value is not part of the wire format:

• It is not serialized (@Transient), i.e. it will never be sent to clients and will not be reconstructed when a challenge is deserialized.

• It is excluded from equals and hashCode, so it does not affect challenge identity, caching, or replay checks.

Typical use cases include attaching an internal database id, request context, or metrics tags.