chore(release): 0.3.1

Author: rahlk

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]
+## [0.3.1] - 2026-07-14
 
 ### Added
 - **Class-attribute initializers** — `PyClassAttribute.initializer` captures the assignment RHS (`_name = 'account.account'` is now recoverable), projected as `PyAttribute.initializer` ([#83](https://github.com/codellm-devkit/codeanalyzer-python/issues/83)).