feat(proto): add CA key escrow RPCs#64
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This was referenced Jul 20, 2026
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What and why
Add
ExportCAKeyandImportCAKeyRPCs tocryptos.fleet.v1.FleetServiceso the manager can relay a node's encrypted CA-key backup between the browser and the node. Encryption stays node-side (Argon2id + AES-256-GCM); the plaintext key never leaves the node, and the operator passphrase is relayed in transit only and never persisted.ExportCAKeyRequest{node_name, passphrase}->ExportCAKeyResponse{envelope}.ImportCAKeyRequest{node_name, envelope, passphrase}->ImportCAKeyResponse{subject_cn, issuer_cn}(a CN summary rather than the full identity chain).fleetv1connectgains both procedures.Closes #63
Part of CryptOS-PKI/manager#24
Verification
How this was verified
task ci(fmt + lint + generate:verify + test) andtask licenseboth green locally.