Add changelog entry

CHANGELOG.md

@@ -2,7 +2,13 @@
 
 All changes that impact users of this module are documented in this file, in the [Common Changelog](https://common-changelog.org) format with some additional specifications defined in the [engine CONTRIBUTING file](https://github.com/OpenTermsArchive/engine/blob/main/CONTRIBUTING.md#changelog). This codebase adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## Unreleased
+## Unreleased [minor]
+
+> Development of this release was supported by the [French Ministry for Foreign Affairs](https://www.diplomatie.gouv.fr/fr/politique-etrangere-de-la-france/diplomatie-numerique/) through its ministerial [State Startups incubator](https://beta.gouv.fr/startups/open-terms-archive.html) under the aegis of the Ambassador for Digital Affairs.
+
+### Added
+
+- Add configuration option to toggle timestamp prefix in logs; set [`@opentermsarchive/federation-api.logger.timestampPrefix` to `true` or `false` in your configuration file](https://docs.opentermsarchive.org/api/federation/#configuring) to control this feature.
 
 ## 2.0.0 - 2024-06-13