Questions about Phoenix Execution Traces and Data Storage Policies

Hey 🙂 , I've been diving into Phoenix, and I'm very interested in the observability provided about the traces during executions. Despite the clear documentation about using Azure OpenAI to keep data private, I do not find information confirming or not if Phoenix is storing information about the execution (and llm responses subsequently ) traced in any database. Is it possible to get any confirmation or did I miss it somewhere? Thank you!