Major Updates to Arize-Phoenix: LLM Evals Library & Tracing Support

We just made a few major updates to Arize-Phoenix, an open-source LLM observability framework. What's new: an LLM evals library and support for LLM traces. Learn more about this topic and dive into a notebook example using LlamaIndex. Blog: https://arize.com/blog/llm-tracing-and-observability-with-arize-phoenix/ Github: https://github.com/Arize-ai/phoenix#llm-traces