docs(changelog): open an [Unreleased] section staging the README Cited By additions for the next release

Author: rahlk

CHANGELOG.md

@@ -5,6 +5,12 @@ 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
+- README **Cited By** section highlighting papers that cite CLDK (SAINT, ASTER, RECON, PRAXIS,
+  Phaedrus, and others), compiled from Semantic Scholar / OpenAlex citation data.
+
 ## [v1.2.0] - 2026-06-22
 
 ### Added