🚀 Feature: Emit OTel Log Events following GenAI semconv for LangChain

Which component is this feature for?

Langchain Instrumentation

🔖 Feature description

Hello 👋 The latest OTel Gen AI semantic conventions put prompt content into OTel Log Events instead of Span attributes/events. In particular, it would be great to see this for LangChain/LangGraph instrumentations.

🎤 Why is this feature needed ?

So telemetry matches the current OTel semantic conventions

✌️ How do you aim to achieve this?

I haven't been joining the GenAI Semconv WG meetings and don't know the current plan. If the plan is to move instrumentation into OTel, I can work on that and implement it in OTel repos.

Otherwise, I can send PRs here.

🔄️ Additional Information

No response

👀 Have you spent some time to check if this feature request has been raised before?

There is https://github.com/traceloop/openllmetry/issues/1455 but it doesn't mention log events specifically

• I checked and didn't find similar issue

Are you willing to submit PR?

Yes I am willing to submit a PR!

Start by reading the linked OTel GenAI semantic conventions for GenAI events and reviewing the existing LangChain and LangGraph instrumentation. Confirm whether the change belongs in this repository or an OTel repository, then define the affected telemetry paths. Done means prompt content is emitted as OTel Log Events in accordance with the current conventions.