Stage 0 Inconsistencies - Gateway Device and State Validation

[pandaio22]

• Issue: No mechanism to validate gateway state;

• Reference: This is the device attestation evidence [RFC9334] that a gateway must collect and convey to each other, where a verifier is assumed to be available to decode, parse and appraise the evidence;

• TODO: Implement a mechanism that complies with [RFC9334] for gateway state evidence collection and conveyance.