Update changelogs for 3.16.0 release preparation

- Consolidate commerce-sdk-react v5.0.0-dev and v4.4.0-dev changelog entries into single section
- Add AWS SDK v2 to v3 migration entry to pwa-kit-runtime changelog

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: kevinxh

packages/commerce-sdk-react/CHANGELOG.md

@@ -1,10 +1,8 @@
 ## v5.0.0-dev (Jan 28, 2026)
 - Upgrade to commerce-sdk-isomorphic v5.0.0 and introduce Payment Instrument SCAPI integration [#3552](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3552)
-
-## v4.4.0-dev (Dec 17, 2025)
-- [Bugfix]Ensure code_verifier can be optional in resetPassword call [#3567](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3567)
+- [Bugfix] Ensure code_verifier can be optional in resetPassword call [#3567](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3567)
 - [Improvement] Strengthening typescript types on custom endpoint options and fetchOptions types [#3589](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3589)
-- [Feature] update `authorizePasswordless`, `getPasswordResetToken`, and `resetPassword` to support use of `email` mode [#3525](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3525)
+- [Feature] Update `authorizePasswordless`, `getPasswordResetToken`, and `resetPassword` to support use of `email` mode [#3525](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3525)
 
 ## v4.3.0 (Dec 17, 2025)
 

packages/pwa-kit-runtime/CHANGELOG.md

@@ -1,4 +1,6 @@
 ## v3.16.0-dev (Dec 17, 2025)
+- Migrate AWS SDK from v2 to v3 [#3566](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3566)
+
 ## v3.15.0 (Dec 17, 2025)
 - Fix multiple set-cookie headers [#3508](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3508)