Be able to offer a link to the LangSmith run corresponding to the LangServe run on the server.

[codekiln]

I apologize if this is already covered by the docs and I haven't seen it. I have seen that langserve.server.add_routes has enable_public_trace_link_endpoint, which enables a public link for the trace. What I'd like is to make it possible for a chat on a private server to have each message be able to link to its run id(s) from when they ran on the server invoked by langserve. Is this supported?

I've seen examples related to this in the langsmith docs; for example, hub-examples/runnable-prompt/edit-in-playground.ipynb has this:

with callbacks.collect_runs() as cb:
    for chunk in chain.stream({"input": "What is the GIL?"}):
        print(chunk.content, end="", flush=True)
    run_id = cb.traced_runs[0].id

But how do I get LangServe to do this for me and return it to the client so I can link to it in such a way that people in our LangSmith organization can view it but nobody else can?