chore(1.0-dev): release 1.0.0-alpha.3 (#986)

🤖 I have created a release *beep* *boop*
---


##
[1.0.0-alpha.3](v1.0.0-alpha.2...v1.0.0-alpha.3)
(2026-04-17)


### Bug Fixes

* update `with_a2a_extensions` to append instead of overwriting
([#985](#985))
([e1d0e7a](e1d0e7a))

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

Author: a2a-bot

.release-please-manifest.json

@@ -1 +1 @@
-{".":"1.0.0-alpha.2"}
+{".":"1.0.0-alpha.3"}

CHANGELOG.md

@@ -1,5 +1,12 @@
 # Changelog
 
+## [1.0.0-alpha.3](https://github.com/a2aproject/a2a-python/compare/v1.0.0-alpha.2...v1.0.0-alpha.3) (2026-04-17)
+
+
+### Bug Fixes
+
+* update `with_a2a_extensions` to append instead of overwriting ([#985](https://github.com/a2aproject/a2a-python/issues/985)) ([e1d0e7a](https://github.com/a2aproject/a2a-python/commit/e1d0e7a72e2b9633be0b76c952f6c2e6fe11e3e5))
+
 ## [1.0.0-alpha.2](https://github.com/a2aproject/a2a-python/compare/v1.0.0-alpha.1...v1.0.0-alpha.2) (2026-04-17)