Update CHANGELOG for 0.8.3 release

Co-authored-by: Claude <claude@anthropic.com>

Author: titouanmathis

CHANGELOG.md

@@ -5,7 +5,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [0.8.3] - 2026-02-09
 
 ### Added