Add Trustabl security scanning to CI

[joshua-trustabl]

We came across your repo and we like how you're aiming to make finding the right LLM models for AI agents more efficient and accessible. We scanned the repo, and noticed agent runtime reliability findings that might be worth reviewing.

1. [MEDIUM] Project uses default OpenAI tracing
   In agentopt/agent_optimizer.py, The project uses the OpenAI Agents SDK with default tracing enabled. What it means: Using default tracing can lead to increased log volume and potential performance overhead, as every API call will be logged.

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)