chore: add CHANGELOG entry for PR #1002

Author: msukkari

CHANGELOG.md

@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+- Added support for configuring SMTP via individual environment variables (SMTP_HOST, SMTP_PORT, SMTP_USERNAME, SMTP_PASSWORD) as an alternative to SMTP_CONNECTION_URL. [#1002](https://github.com/sourcebot-dev/sourcebot/pull/1002)
+
 ## [4.15.6] - 2026-03-13
 
 ### Added