updated CHANGELOG.md

Author: kenliao94

CHANGELOG.md

@@ -5,6 +5,20 @@ 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).
 
+## [2.1.0] - 2025-05-15
+
+### Added
+- Added CONTRIBUTING.md with development guidelines and workflow instructions
+- Improved documentation for contributor onboarding
+
+### Changed
+- Enhanced error handling for RabbitMQ connection failures
+- Updated dependencies to latest versions for improved security
+- Use loguru for better logging matainability. Logging to stderr by default.
+
+### Fixed
+- Fixed issue with queue name validation in certain edge cases
+
 ## [2.0.0] - 2025-04-30
 
 ### Added