fix(agent-framework): pin supported beta install

[sonleoracle]

Summary

• Pin the agent-framework extra to the known-compatible beta package
• Rely on that pinned agent-framework package to resolve the matching agent-framework-core dependency
• Leave constraints files unchanged
• Disable OpenAI Agents SDK trace export in adapter tests so the fake test API key does not trigger background posts to api.openai.com during CI

Validation

• Fresh temp install of pyagentspec[agent-framework] without an explicit agent-framework-core requirement resolved agent-framework==1.0.0b260130 and agent-framework-core==1.0.0b260130
• pip check passed in that temp install
• Pre-commit hooks passed via shared agent-spec venv
• Targeted OpenAI Agents live/simple-flow plus security/datastore regression passed locally with the shared venv and LLM env

[dhilloulinoracle]

Internal regression failed: Build ID #498

[dhilloulinoracle]

Internal regression succeeded 🍏: Build ID #499

[dhilloulinoracle]

Internal regression succeeded 🍏: Build ID #500

[dhilloulinoracle]

Internal regression succeeded 🍏: Build ID #501