Release v0.5.1

• Remove dependency on vix::core
• Require vix::net only
• Make sync, cache, utils optional
• Cleaner, modular build
• Internal refactors (discovery, node, router)

Release v0.5.0

feat(p2p): complete secure transport with AEAD envelopes and session keys (phase 6)

• Add encrypted Envelope format with nonce (96-bit) and auth tag (128-bit)
• Introduce AEAD encrypt/decrypt API in Crypto (with NullCrypto dev implementation)
• Derive per-peer session keys from handshake transcript
• Enable secure channels after successful handshake
• Add replay protection using per-peer nonce counters
• Decrypt and authenticate payloads before message dispatch
• Keep handshake and control messages backward-compatible (plaintext)

Phase 6 (secure transport) is now complete. Next: secure WAL / Outbox (phase 6.6).

Release v0.4.0

Key changes:

• Added AEAD support (encrypt + authenticate) using per-peer session keys.
• Extended Envelope format with nonce (96-bit) and authentication tag (128-bit).
• Derived and stored a 32-byte session key at the end of the handshake.
• Enabled secure channels per peer with send-side nonce counters.
• Implemented decrypt-before-dispatch logic in Node to transparently handle
  encrypted payloads.
• Kept handshake and control messages (Hello, Ping/Pong) in plaintext to
  preserve backward compatibility and simplify bootstrapping.
• Provided a NullCrypto AEAD implementation for development and testing.

This lays the foundation for fully secure WAL / Outbox synchronization and
future replay protection (Phase 6.6).

Release v0.3.0

• Added HTTP bootstrap service for peer discovery
• Introduced Bootstrap.hpp and BootstrapHttp.cpp
• Extended Node lifecycle for bootstrap integration
• Manual test registry added