What's Changed

• fix: LlamaIndex callback handler drops events if the start_event handler is not called by @anticorrelator in https://github.com/Arize-ai/phoenix/pull/1668
• ci: Use ruff formatter by @anticorrelator in https://github.com/Arize-ai/phoenix/pull/1682
• ci: remove black and update ruff in .pre-commit-config.yaml by @RogerHYang in https://github.com/Arize-ai/phoenix/pull/1686
• fix(traces): refetch traces and spans even when searching by @mikeldking in https://github.com/Arize-ai/phoenix/pull/1683
• feat(evals): in llm_classify, use function calling to constrain LLM outputs when available; llm_classify now returns a dataframe by @axiomofjoy in https://github.com/Arize-ai/phoenix/pull/1651

Full Changelog: https://github.com/Arize-ai/phoenix/compare/v0.0.50...v0.0.51