docs: add CHANGELOG entry for current release

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: affandar

CHANGELOG.md

@@ -5,6 +5,15 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.1.16] - 2026-03-15
+
+### Changed
+- Bumped `duroxide` to 0.1.26, `duroxide-pg` to 0.1.27.
+- KV delta table support: fixes read-modify-write replay poisoning by separating current-execution mutations from prior-execution snapshots.
+
+### Added
+- KV read-modify-write counter e2e test (`sample_kv_read_modify_write_counter`).
+
 ## [0.1.15] - 2026-03-14
 
 ### Changed