invora.documents.v2.RegulationArtifact

A single artifact produced by a regulation (e.g. signed XML, clearance response, QR blob).
Artifact bytes are downloaded separately via the GetArtifact RPC — this message carries
only the identity and integrity fields needed for listing and verification.

{
    "id": "string",
    "contentType": "string",
    "hash": "string",
    "sizeBytes": "string",
    "metadata": {}
}