b8ce58ddf0
aura-crypto: X25519 + ML-KEM-768 (FIPS 203) hybrid KEM, HKDF-SHA256 session key derivation, ChaCha20-Poly1305 AeadSession with counter nonces; genuine NIST ACVP ML-KEM-768 KAT (decapsulation vector). 16 tests green, clippy clean. aura-pki: self-signed CA, server/client cert issuance (rcgen 0.14), mutual X.509 chain verification via rustls-webpki, CRL revocation. 8 tests green. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>