EEP-79 native records for the representation axis (thrift_runtime:repr() value native).

Native records exist from OTP 29 on, while this runtime keeps minimum_otp_vsn on 28, so every reference to the records module and to the is_record/1 BIF lives behind a -if(?OTP_RELEASE >= 29) conditional: older releases compile the stub branch, where is_native/1 answers false and the conversions raise native_records_unsupported. The facade turns the gate into {error, {unsupported_repr, native}} before any conversion runs.

The runtime never compiles record definitions: values are minted with records:create/4 from the wire field map (all declared fields present, missing wire fields as undefined), stamped with the descriptor's module and the lowercased struct name — the same tag a tuple record of that struct carries. Values are created exported, since they are handed out of the module that decoded them.