snider a5ed7ebee6 feat: Implement challenge-response authentication for P2P (P2P-CRIT-4) ... - Add GenerateChallenge() for random 32-byte challenge generation - Add SignChallenge() using HMAC-SHA256 with shared secret - Add VerifyChallenge() with constant-time comparison - Update performHandshake() to send challenge and verify response - Update handleWSUpgrade() to sign incoming challenges - Add comprehensive tests for challenge-response flow The challenge-response authentication proves the peer has the matching private key for their public key by signing a random challenge with the ECDH-derived shared secret. This prevents impersonation attacks. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>		2025-12-31 15:16:00 +00:00
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database	test: Add error path unit tests for context cancellation and cleanup	2025-12-31 13:04:20 +00:00
logging	feat: Add structured logging package	2025-12-31 11:18:22 +00:00
mining	feat: Implement peer allowlist for P2P security (P2P-CRIT-1)	2025-12-31 15:06:52 +00:00
node	feat: Implement challenge-response authentication for P2P (P2P-CRIT-4)	2025-12-31 15:16:00 +00:00