Add support for Opik tracking

[pmenendz]

Track conversations using opik: https://www.comet.com/site/products/opik/

[Copilot]

Pull Request Overview

Adds optional Opik support to trace agent conversations and configures it via environment or project settings.

• Validates and reports Opik configuration in Config
• Integrates OpikTracer in the agent setup and conversation loop
• Updates dependencies, examples, and documentation for Opik

Reviewed Changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/expert/config.py	Added Opik API key validation and new config properties
src/expert/agent.py	Hooked in OpikTracer during setup and chat loop
pyproject.toml	Added opik dependency
config.yaml	Added default opik section
README.md	Documented Opik setup and env variables
.env.example	Added Opik environment variable examples

Comments suppressed due to low confidence (3)

README.md:168

• The README and .env example reference OPIK_WORKSPACE, but the code does not consume or use this variable. Either implement support for it or remove it from the documentation to avoid confusion.

- `OPIK_WORKSPACE` (optional): Your Opik workspace name for conversation tracing

src/expert/agent.py:96

• There are no tests covering the new Opik tracer initialization and the conditional callback attachment in the chat loop. Please add unit or integration tests to verify both enabled and disabled tracing behaviors.

        if self.config.opik_api_key:

src/expert/config.py:63

• The openai_api_key property was removed during this change, which may break existing references to config.openai_api_key. Please re-add it or update callers to use the correct method for retrieving the OpenAI key.

    def opik_config(self) -> dict[str, Any]: