[doc] introduce CHANGELOG file

Signed-off-by: Benjamin Grolleau <benjamin.grolleau@outlook.com>

Author: Grolleau-Benjamin

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,5 +1,10 @@
 ## IMPORTANT INFORMATION
 
+### PR Checklist
+
+- [ ] I have updated the CHANGELOG.md file with a description of my changes.
+- [ ] I have signed the Contributor License Agreement (CLA).
+
 ### Contributor License Agreement (CLA)
 * The Pull Request feature will be considered by STMicroelectronics after the signature of a **Contributor License Agreement (CLA)** by the submitter.
 * If you did not sign such agreement, please follow the steps mentioned in the [CONTRIBUTING.md](CONTRIBUTING.md) file.

CHANGELOG.md

@@ -0,0 +1,34 @@
+# Changelog
+
+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).
+
+> **Note:** This changelog starts from version v1.2.0. For prior releases, refer to the
+> [GitHub Releases page](https://github.com/STMicroelectronics/STSELib/releases).
+
+---
+
+## [Unreleased](https://github.com/STMicroelectronics/STSELib/compare/v1.1.7...HEAD) - v1.2.0
+
+### Breaking Changes
+
+- **Renamed** `stse_Handler_t` to `stse_Handle_t` — all references to the handle type must be updated in application code ([31fb0fa](https://github.com/STMicroelectronics/STSELib/commit/31fb0fa9865828d82479e8c40fa3499c68b33fe9))
+- **API change** — all platform-level SecureElement initialization functions now require an additional `void *pArg` parameter ([51aa3f8](https://github.com/STMicroelectronics/STSELib/commit/51aa3f8114d33adfe38da6fd261e4b9a71a1fa9b))
+
+### Added
+
+### Changed
+
+### Deprecated
+
+### Removed
+
+### Fixed
+
+### Security
+
+---
+
+## [V1.1.7 — March 4, 2026](https://github.com/STMicroelectronics/STSELib/releases/tag/v1.1.7)

README.md

@@ -62,12 +62,17 @@ Reference implementation for most common STSE applicative use case can be found
 Following applicative project can be used as reference for STSELib integration and usage.
 
 - STSAFE-A
-    - [stsafe-a-sdk](https://github.com/STMicroelectronics/STSAFE-A120-sdk) 
-    - [wolfssl-examples](https://github.com/wolfSSL/wolfssl-examples/tree/master/stsafe) developed and maintained by [WolfSSL](https://www.wolfssl.com/) 
-    - [Zephyr_st-stsafe-a1xx](https://github.com/catie-aq/zephyr_st-stsafe-a1xx) developed and maintained by [CATIE](https://www.catie.fr/language/en/home/) 
+    - [stsafe-a-sdk](https://github.com/STMicroelectronics/STSAFE-A120-sdk)
+    - [wolfssl-examples](https://github.com/wolfSSL/wolfssl-examples/tree/master/stsafe) developed and maintained by [WolfSSL](https://www.wolfssl.com/)
+    - [zephyr_st-stsafe-a1xx](https://github.com/catie-aq/zephyr_st-stsafe-a1xx) developed and maintained by [CATIE](https://www.catie.fr/language/en/home/)
 
 
 - STSAFE-L
     - [STSAFE-L_echo](https://github.com/STMicroelectronics/STSAFE-L_echo)
     - [STSAFE-L_device_authentication](https://github.com/STMicroelectronics/STSAFE-L_device_authentication)
     - [STSAFE-L_secure_data_storage](https://github.com/STMicroelectronics/STSAFE-L_secure_data_storage)
+
+## Changelog
+
+See [CHANGELOG.md](CHANGELOG.md) for the full history of changes.
+For releases prior to v1.2.0, refer to the [GitHub Releases page](https://github.com/STMicroelectronics/STSELib/releases).