chore(python): bump a2a-sdk to 0.3.23

[lithammer]

The main motivation is that it includes this fix:

• fix(server): fix deadlocks on agent execution failure in non-streaming a2aproject/a2a-python#614

It's described in more detail from a kagent perspective here:

• fix: avoid 500s when a2a cleanup is cancelled #1268

[Copilot]

Pull request overview

This PR bumps the a2a-sdk dependency from version 0.3.22 to 0.3.23 across all kagent Python packages. The primary motivation is to incorporate a critical fix that prevents CancelledError exceptions during cleanup from causing HTTP 500 responses, which previously led to client retries and duplicate side effects (such as duplicate Slack messages). The fix treats CancelledError during cleanup as non-fatal, ensuring that successfully completed requests don't get converted into 500 errors.

Changes:

• Updated a2a-sdk version to 0.3.23 in the uv.lock file with updated package hashes and metadata
• Bumped minimum version requirement for a2a-sdk to >=0.3.23 across all five dependent kagent packages

Reviewed changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
python/uv.lock	Updated a2a-sdk package definition from 0.3.22 to 0.3.23 with new hashes, file URLs, and metadata references
python/packages/kagent-adk/pyproject.toml	Updated a2a-sdk minimum version from >=0.3.22 to >=0.3.23
python/packages/kagent-core/pyproject.toml	Updated a2a-sdk[http-server] minimum version from >=0.3.9 to >=0.3.23
python/packages/kagent-crewai/pyproject.toml	Updated a2a-sdk[http-server] minimum version from >=0.3.1 to >=0.3.23
python/packages/kagent-langgraph/pyproject.toml	Updated a2a-sdk minimum version from >=0.2.16 to >=0.3.23
python/packages/kagent-openai/pyproject.toml	Updated a2a-sdk minimum version from >=0.3.1 to >=0.3.23

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[lithammer]

I updated the version across the board, not sure if that's correct/wanted or not.

[EItanya]

Thanks so much for the PR, you will need to sign your commits for us to merge it

[lithammer]

Thanks so much for the PR, you will need to sign your commits for us to merge it

Oops, forgot about that. My bad. Should be fixed now.