get: a stored quote with its verification status, PCR selection and digest, TPM firmware and its comparison with reference values (reference_status: match, mismatch, no_reference).
references: known-good PCR sets per device class and release. Each is signed by a release key the server trusts; add posts {device_class, pcr_selection, pcr_digest, release, signer_key_id, signature} from --file. retire withdraws a release.
get needs events:read; references need devices:read / devices:write. Reference values must be signed by a release key configured on the server (PHYCLOUD_REFERENCE_KEYS_FILE).