chore(main): release 0.3.22 (a2aproject#599)

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


##
[0.3.22](a2aproject/a2a-python@v0.3.21...v0.3.22)
(2025-12-16)


### Features

* Add custom ID generators to `SimpleRequestContextBuilder`
([a2aproject#594](a2aproject#594))
([04bcafc](a2aproject@04bcafc))


### Code Refactoring

* Move agent card signature verification into `A2ACardResolver`
([6fa6a6c](a2aproject@6fa6a6c))

---
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

CHANGELOG.md

@@ -1,5 +1,17 @@
 # Changelog
 
+## [0.3.22](https://github.com/a2aproject/a2a-python/compare/v0.3.21...v0.3.22) (2025-12-16)
+
+
+### Features
+
+* Add custom ID generators to SimpleRequestContextBuilder ([#594](https://github.com/a2aproject/a2a-python/issues/594)) ([04bcafc](https://github.com/a2aproject/a2a-python/commit/04bcafc737cf426d9975c76e346335ff992363e2))
+
+
+### Code Refactoring
+
+* Move agent card signature verification into `A2ACardResolver` ([6fa6a6c](https://github.com/a2aproject/a2a-python/commit/6fa6a6cf3875bdf7bfc51fb1a541a3f3e8381dc0))
+
 ## [0.3.21](https://github.com/a2aproject/a2a-python/compare/v0.3.20...v0.3.21) (2025-12-12)