Function classify_record_admission_binding 

pub fn classify_record_admission_binding<EF, V, LF>(
    presented_identity: PresentedIdentity<'_, EF, V, LF>,
    binding: &BindingState,
    receiving_binding_epoch: BindingEpoch,
    request: &RecordAdmission,
) -> Option<RecordAdmissionResponse>

Classifies one ordinary record admission through the shared binding-required lookup WITHOUT consuming any claim-frontier authority.

This is the frontier-free prefix of apply_record_admission: exactly the frozen stage 2-5 rows (Retired, ParticipantUnknown, StaleAuthority, NoBinding) minted through the same sealed request-bound constructors the total selector uses. None means the presented authority is fully authorized and the operation must continue through the frontier-consuming total selector — a caller without that authority must fail closed rather than fabricate a later-stage outcome.