Update changelog

CHANGELOG.md

@@ -5,6 +5,16 @@ 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).
 
+## Unreleased
+
+### Fixed
+
+- Fixed the user settings (like the base currency, the emergency fund and the savings rate) to be taken from the impersonated user instead of the authenticated user
+- Fixed the base currency of the activities to be taken from the impersonated user
+- Fixed the account aggregations to be calculated for the impersonated user
+- Fixed the base currency of the dividends to be taken from the impersonated user
+- Fixed the validation of the impersonation identifier of an unknown user
+
 ## 3.47.0 - 2026-08-10
 
 ### Changed