fix(hip): REG_FAILED reads Failure Type as a lifetime and its Reg Types as failure types #2309

Describe the bug
In RFC 8003 §4.5, REG_FAILED carries a Failure Type octet followed by Reg Type octets, and no lifetime. RegFailedParameter names the first octet lifetime, and _read_param_reg_failed reports it as timedelta(seconds=octet). It also decodes the following octets with RegistrationFailure, which is the Failure Type registry, rather than Registration.

Reproduction
HIP(parameters=[(Parameter.REG_FAILED, {'lifetime': 1, 'reg_failed': [1]})], ...) packs 03a8000201010000, which parses back as lifetime=0:00:01, reg_type=(<RegistrationFailure.Registration_type_unavailable: 1>,). Per RFC this is Failure Type 1 (registration type unavailable) for Reg Type 1 (RENDEZVOUS).

Expected behavior
A failure_type: RegistrationFailure and a reg_type: tuple[Registration, ...].

Suggested fix
Rename the schema field and the data attribute, and switch the list's namespace to Registration. The bytes stay unchanged, but the public data model changes, so it needs a ruling.

System information
Linux, CPython 3.14.9, pcapkit 1.5.0b14 at 9d504ead5.

Recommendation: Follow the RFC: replace lifetime with failure_type and keep no alias, in line with the no-re-export ruling for moved names (#1715). Record it as versionchanged on the data class.