Update CHANGELOG.md

[maneeshaxyz]

📌 Description

• Closes #

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🔍 Changes Made

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✅ Checklist (Email System)

• Core services tested (SMTP, IMAP, mail storage, end-to-end delivery)
• Security & compliance verified (auth via Thunder IDP, TLS, DKIM/SPF/DMARC, spam/virus filtering)
• Configuration & deployment checked (configs generated, Docker/Compose updated)
• Reliability confirmed (error handling, logging, monitoring)
• Documentation & usage notes updated (README, deployment, API)

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🧪 Testing Instructions

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📷 Screenshots / Logs (if applicable)

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⚠️ Notes for Reviewers

[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request updates the project's changelog to include the details for version 0.2.2. The new entry summarizes recent feature additions such as multi-domain support, enhanced configuration, and group address validation, alongside an upgrade to Thunder and the removal of outdated integrations.

Highlights

• Multi-domain Support: Added support for multiple domains and improved configuration handling.
• Group Address Validation: Implemented validation logic for group addresses in the user-exists map.
• Thunder Upgrade: Upgraded the Thunder image version to 0.27.0 in Docker Compose.
• Legacy Integration Removal: Removed the legacy socketmap handler and Thunder integration.

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[gemini-code-assist]

Code Review

This pull request updates the CHANGELOG.md file to add an entry for the 0.2.2 release. My review focuses on ensuring the new entry is consistent with the existing format of the changelog. I've suggested categorizing the changes to align with the 'Keep a Changelog' standard used in the project.

[gemini-code-assist]

To maintain consistency with the rest of the changelog and adhere to the 'Keep a Changelog' format mentioned in the file header, it's better to categorize the changes under Added, Changed, and Removed. This improves readability and follows the established pattern in this file.

Suggested change

	## [0.2.2]
	Multi-domain support, improved configuration handling, group address validation, Thunder upgrade to 0.27.0, and removal of legacy socketmap/Thunder integration.
	## What's Changed
	* feat: enhance setup scripts for multi-domain support and improve configuration handling by @Aravinda-HWK in https://github.com/LSFLK/silver/pull/301
	* feat: add support for group address validation in user-exists map and implement group validation logic by @Aravinda-HWK in https://github.com/LSFLK/silver/pull/302
	* feat: upgrade Thunder image version to 0.27.0 in Docker Compose by @Aravinda-HWK in https://github.com/LSFLK/silver/pull/303
	* Refactor: Remove socketmap handler and thunder integration by @Aravinda-HWK in https://github.com/LSFLK/silver/pull/305
	**Full Changelog**: https://github.com/LSFLK/silver/compare/v.0.2.1...v.0.2.2
	## [0.2.2]
	Multi-domain support, improved configuration handling, group address validation, Thunder upgrade to 0.27.0, and removal of legacy socketmap/Thunder integration.
	## What's Changed
	### Added
	* feat: add support for group address validation in user-exists map and implement group validation logic by @Aravinda-HWK in https://github.com/LSFLK/silver/pull/302
	### Changed
	* feat: enhance setup scripts for multi-domain support and improve configuration handling by @Aravinda-HWK in https://github.com/LSFLK/silver/pull/301
	* feat: upgrade Thunder image version to 0.27.0 in Docker Compose by @Aravinda-HWK in https://github.com/LSFLK/silver/pull/303
	### Removed
	* Refactor: Remove socketmap handler and thunder integration by @Aravinda-HWK in https://github.com/LSFLK/silver/pull/305
	**Full Changelog**: https://github.com/LSFLK/silver/compare/v.0.2.1...v.0.2.2