Update OpenAPI specification for v0.3.2

- Updated OpenAPI version from 0.0.7 to 0.3.2
- Added documentation for response signing headers (X-License-Signature, X-License-Timestamp)
- Enhanced API description with security information about signature verification
- Added header component definitions to OpenAPI spec
- All endpoint 200 responses now reference optional signature headers

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -7,6 +7,21 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.3.2] - 2026-01-22
+
+### Changed
+
+- Updated OpenAPI specification to version 0.3.2
+- Added documentation for response signing headers (X-License-Signature, X-License-Timestamp)
+- Enhanced API description with response signing security information
+
+### Technical Details
+
+- OpenAPI spec now documents optional response signature headers
+- Added header component definitions for X-License-Signature and X-License-Timestamp
+- All endpoint 200 responses now reference signature headers
+- Improved API documentation describing SecureLicenseClient usage
+
 ## [0.3.1] - 2026-01-22
 
 ### Changed
@@ -410,7 +425,8 @@ define('WC_LICENSE_SERVER_SECRET', 'your-secure-random-string-min-32-chars');
 - WordPress REST API integration
 - Custom WooCommerce product type extending WC_Product
 
-[Unreleased]: https://src.bundespruefstelle.ch/magdev/wc-licensed-product/compare/v0.3.1...HEAD
+[Unreleased]: https://src.bundespruefstelle.ch/magdev/wc-licensed-product/compare/v0.3.2...HEAD
+[0.3.2]: https://src.bundespruefstelle.ch/magdev/wc-licensed-product/compare/v0.3.1...v0.3.2
 [0.3.1]: https://src.bundespruefstelle.ch/magdev/wc-licensed-product/compare/v0.3.0...v0.3.1
 [0.3.0]: https://src.bundespruefstelle.ch/magdev/wc-licensed-product/compare/v0.2.2...v0.3.0
 [0.2.2]: https://src.bundespruefstelle.ch/magdev/wc-licensed-product/compare/v0.2.1...v0.2.2