fix: wrong method name for ExtendedAgentCard endpoint in JsonRpc compat version

[guglielmo-san]

Description

The correct method name for the ExtendedAgentCard endpoint in JsonRpc v.0.3.0 is agent/getAuthenticatedExtendedCard.
https://a2a-protocol.org/v0.3.0/specification/#710-agentgetauthenticatedextendedcard

[github-actions]

🧪 Code Coverage (vs 1.0-dev)

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	Base	PR	Delta
src/a2a/compat/v0_3/jsonrpc_adapter.py	47.01%	67.16%	🟢 +20.15%
Total	91.56%	91.91%	🟢 +0.35%

Generated by coverage-comment.yml

[gemini-code-assist]

Code Review

This pull request transitions the A2A SDK to version 1.0, replacing Pydantic-based serialization with Protobuf for messaging and database persistence while ensuring backward compatibility with v0.3. It introduces a new Alembic-based database migration CLI, schema updates for task ownership, and refactored transport implementations for gRPC, REST, and JSON-RPC. Feedback identifies a violation of the project's exception-raising conventions in the event queue implementation.

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src/a2a/server/events/event_queue.py (221)

Exception classes must be raised directly without instantiation, as per the repository rules. Please remove the instantiation and the message to adhere to the rule: 'Raise exception classes directly, without instantiating them'.

References

1. Raise exception classes directly, without instantiating them (e.g., raise MyError instead of raise MyError()).