chore(main): release 0.3.5

Author: a2a-bot

CHANGELOG.md

@@ -1,5 +1,12 @@
 # Changelog
 
+## [0.3.5](https://github.com/a2aproject/a2a-python/compare/v0.3.4...v0.3.5) (2025-09-02)
+
+
+### Bug Fixes
+
+* **proto:** Adds metadata field to A2A DataPart proto ([#455](https://github.com/a2aproject/a2a-python/issues/455)) ([6d0ef59](https://github.com/a2aproject/a2a-python/commit/6d0ef593adaa22b2af0a5dd1a186646c180e3f8c))
+
 ## [0.3.4](https://github.com/a2aproject/a2a-python/compare/v0.3.3...v0.3.4) (2025-09-02)