First-class runner adapters for popular agent frameworks

[rudrakshkarpe]

Summary

Users currently must write custom trace conversion code. Provide thin adapters for popular frameworks.

Scope

• LangChain adapter (trace callback → AgentTrace)
• CrewAI adapter
• AutoGen adapter
• OpenAI Assistants API adapter
• Each adapter as optional dependency group (e.g., pip install dual-llm-bench[langchain])

Acceptance Criteria

• At least 2 framework adapters shipped
• Each adapter has usage examples
• Optional dependencies — core package stays lightweight
• Tests with mocked framework outputs