Signed current Merkle root for the canonical-card transparency log.
Transparency
Signed current Merkle root for the canonical-card transparency log.
Returns the current root + tree_size + published_at, signed by the active AAP signing key. Distinct typ from per-card attestations (AAP-TransparencyRoot/v1). Cacheable for 30 seconds; consumers refresh when they want a fresh root. cards-as-primitive Phase 5 A2.
GET
Signed current Merkle root for the canonical-card transparency log.
Response
Signed root, or an empty-state payload when the log has no entries.