changelog: release 0.4.5 (#109)

Author: simba-git

CHANGELOG.md

@@ -6,6 +6,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+
+## [0.4.5] - 2025-07-02
 ### Added
 - Context caching with `MemoryCache` and optional `RedisCache` backends.
 - `EnrichMCP.get_context()` returns an `EnrichContext` instance mirroring the underlying FastMCP context.