release: v0.4.0

Author: quantbai

CHANGELOG.md

@@ -5,7 +5,7 @@ All notable changes to this project will be documented in this file.
 Format follows [Keep a Changelog](https://keepachangelog.com/).
 Numerical changes are marked with [NUMERICAL].
 
-## [0.4.0] - 2026-03-25
+## [0.4.0] - 2026-03-26
 
 ### Added
 - `show_versions()` for environment diagnostics in bug reports