docs(changelog): record GDPR/DSGVO join-form description under Unreleased

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]
+
+### Added
+- **GDPR/DSGVO join-form description** – Custom fields can carry a "join form description" that is shown as the field's label on the public join form, with clickable external links (whole URLs and Markdown `[text](url)`). Useful for presenting a GDPR confirmation with a link to an externally hosted privacy declaration before sign-up.
+- **Join-form description tooltip in member details** – Custom fields that have a join-form description show an info tooltip (prefixed "Beitrittsformular:") on their label in the member detail view.
+- **Editable join-form description** – Admins can set a field's join-form description in the custom-field settings, with an inline hint about the supported link syntax.
+
+### Changed
+- **Default GDPR custom field** – The seeded GDPR field was shortened from "Datenschutzerklärung akzeptiert" to "DSGVO" and now ships with a default join-form description (with a placeholder link to replace).
+
 ## [1.2.0] - 2026-05-08
 
 ### Changed