Release v0.4.0

Full Changelog: v0.3.0...v0.4.0

v0.3.0

Full Changelog: v0.2.0...v0.3.0

v0.2.0

refactor

v0.1.0 — Sync engine extracted

• First standalone release of the Vix sync engine
• WAL, outbox, retry policies
• Network layer split into net module
• Clean CMake targets (vix::sync)
• Tests fixed and passing