Add Trustabl Agent Scanner to CI

[trustabl-kathrina]

We came across your repo and we like how you've built a robust framework for orchestrating asynchronous workflows using Python. We scanned the repo, and noticed agent runtime reliability findings that might be worth reviewing.

1. [HIGH] Agent uses WebSearchTool without input_guardrails
   File: tests/contrib/openai_agents/research_agents/search_agent.py
   What it means: This agent is wired with WebSearchTool, which fetches content from the public internet, but has no input_guardrails configured.

Recommendations are based on our understanding of agent runtime reliability, some findings may be intentional. Please let us know if this was intentional or if our findings are helpful so we can improve the accuracy of the scanner.

Best,
Trustabl.ai
Open-source AI agent reliability scanner (runs locally, GitHub Action)

[CLAassistant]

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