fix(tck): resolve capability test failures for push notifications

[sherryfox]

• Save pushNotificationConfig in onMessageSend for non-streaming messages, fixing test_send_message_with_push_notification_config

Failures before the fixes:

======================================================== FAILURES ========================================================
____________________________________ test_send_message_with_push_notification_config _____________________________________
tests/optional/capabilities/test_push_notification_config_methods.py:511: in test_send_message_with_push_notification_config
    assert found_config, (
E   AssertionError: Push notification config from SendMessageConfiguration was not found in task configs. Expected URL: http://localhost:8888/webhook. Retrieved 0 config(s): []. This indicates the pushNotificationConfig in SendMessageConfiguration was ignored.
E   assert False
--------------------------------------------------- Captured log call ----------------------------------------------------
ERROR    tests.optional.capabilities.test_push_notification_config_methods:test_push_notification_config_methods.py:507 ❌ Push notification config from SendMessageConfiguration was NOT found!
ERROR    tests.optional.capabilities.test_push_notification_config_methods:test_push_notification_config_methods.py:508 Expected URL: http://localhost:8888/webhook
ERROR    tests.optional.capabilities.test_push_notification_config_methods:test_push_notification_config_methods.py:509 Available configs: []
================================================ short test summary info =================================================
FAILED tests/optional/capabilities/test_push_notification_config_methods.py::test_send_message_with_push_notification_config - AssertionError: Push notification config from SendMessageConfiguration was not found in task configs. Expected URL: h...

After the fixes all tests are passing:

================================================================================
📊 COMPREHENSIVE TEST RESULTS SUMMARY
================================================================================

🔴 Mandatory Tests:           ✅ PASSED (p:31/f:0/x:0/e:0/s:2)
🔄 Capability Tests:          ✅ PASSED (p:36/f:0/x:1/e:0/s:39)
🚀 Transport Equivalence:     ✅ PASSED (p:12/f:0/x:0/e:0/s:4)
🛡️  Quality Tests:             ✅ PASSED (p:14/f:0/x:0/e:0/s:0)
🎨 Feature Tests:             ✅ PASSED (p:15/f:0/x:0/e:0/s:1)

🎉 A2A COMPLIANCE: ✅ PASSED
Your implementation meets A2A specification requirements!
🔄 CAPABILITY HONESTY: ✅ EXCELLENT
All declared capabilities work correctly!
🛡️  PRODUCTION QUALITY: ✅ HIGH
Implementation is robust and production-ready!
🎨 FEATURE COMPLETENESS: ✅ COMPREHENSIVE
Implementation includes valuable optional features!

🏆 OUTSTANDING A2A IMPLEMENTATION!

[gemini-code-assist]

Code Review

This pull request updates Kafka to version 4.2.0, enhances the deployment scripts with a PostgreSQL pod creation wait loop, and refactors JSON-RPC handling to improve validation and spec compliance. It introduces check() methods for request validation and a custom TypeAdapterFactory to ensure JSON-RPC 2.0 compliance for responses. Feedback was provided regarding the inconsistent validation of the mandatory jsonrpc field in streaming requests and potential precision loss when serializing numeric IDs.

[kabir]

/gemini review

[gemini-code-assist]

Code Review

This pull request implements push notification configuration storage within DefaultRequestHandler and adds a null-safety check for extensions in the AgentCapabilities record. Review feedback identifies a potential NullPointerException risk when taskId is null due to its use as a key in a ConcurrentHashMap. Additionally, it is recommended to use List.copyOf in the AgentCapabilities constructor to ensure the list is unmodifiable and defensively copied.

[sherryfox]

Hey @kabir @ehsavoie, I removed one of the fixes as it seems to be passing already at base so there is just remaining a fix for test_send_message_with_push_notification_config.

Would you have some time to take another look? 🙏

[kabir]

Thank you @sherryfox! Just want to check with @jmesnil since he's more up to speed with the current state of the TCK than I am