Ensure OpenAI dependencies are updated in CI

[zhongkaifu]

Motivation

• Tests were failing with ImportError: cannot import name 'AsyncOpenAI' from 'openai' due to an openai / openai-agents version mismatch.
• The CI installs dependencies via pip install -r requirements.txt, which can still result in an older openai being present (cache, resolver behavior, or preinstalled package).
• Ensure CI installs a compatible openai (1.x) before running tests so openai-agents can import AsyncOpenAI.

Description

• Update .github/workflows/ci.yml to explicitly upgrade/install openai>=1.30.0 and openai-agents during the Install dependencies step: pip install -U "openai>=1.30.0" "openai-agents".
• Keep the existing pip install -r requirements.txt step to install the rest of the dependencies.
• Add a small Python snippet in CI to print installed versions: prints openai.__version__ and agents.__version__ (or unknown) to help verify the installed packages.

Testing

• No automated tests were executed as part of this change (CI workflow change only).
• CI will still run the repository test suite with pytest --junitxml=reports/pytest.xml as before; the added version prints will help diagnose any remaining dependency issues.
• The change was applied and committed; validation of the fix will occur on the next CI run where the versions will be printed in the job logs.

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