llmAntidote v3.0.0

Signed fleet admission release for Hermes Agent. Adds role-separated Ed25519 policy, attestation, and receipt signatures; strict canonical JSON; out-of-band trusted policy digests; evidence-bound model promotion gates; signed PASS/DENY receipts; a signer-pinned metadata-only SQLite fleet ledger; standalone CI/CD commands; and protected GitHub admission workflow guidance. Includes updated README instructions for policy digest capture, model-lock-bound behavioral evaluation, admission, and receipt ingestion.