[Feature request] Use Langfuse to replace LangSmith

[ftufkc]

Currently, midscene uses LangSmith as the observability platform for the LLM.But considering that LangSmith is a closed-source commercial product, it cannot allow users to self-deploy.However, Langfuse supports free self-hosting, allowing users to deploy on their own infrastructure and maintain complete control over costs and data privacy.

For ordinary users, they can also register an account on the Langfuse cloud platform and configure the key in midscene to use it. For self-deployed users, they can use their own deployed platform.

For midscene, the Langfuse JS/TS SDK provides a wrapper function around the OpenAI SDK, which reduces the reconstruction cost of midscene.

Hope you can consider this feature.😄

[StoneHW]

You're spot on! That's exactly how I see it too.