Module poc 

PoC (Proof of Continuity) payload model.

Defines the PoC data structure for CBOR serialization within COSE_Sign1 envelope. Based on PIC Spec v0.2.

Key changes from v0.1:

• proof.poi replaced by attestations[] (Executor Attestation array)
• proof.pop is now per-attestation (inside each attestation that requires it)
• proof.challenge moved to COSE protected header
• proof.key_material removed (key is extracted from attestation credential)

The PoC proves causal continuity by demonstrating that the executor:

1. Holds a valid predecessor PCA
2. Can attest its identity via one or more attestations
3. Requests authority that is a subset of the predecessor’s

Structs

ExecutorAttestation

Executor Attestation - a verifiable document attesting executor properties.

PocBuilder

Builder for creating PoC payloads.

PocPayload

PoC Payload - the CBOR content signed by the executor with COSE_Sign1.

Successor

Successor - proposed authority for the next hop.