Langfuse: add invocation_context to identify traces

[vblagoje]

• WIP, used to demonstrate a possible solution to Feature request for the possibility of adding user_id to the trace while using Haystack<>Langfuse connector #916

[ggdupont]

Any estimate on when this could be merged?

[vblagoje]

Do you find this PR useful @ggdupont ? Can you tell us a bit about your use case please?

[ggdupont]

Do you find this PR useful @ggdupont ? Can you tell us a bit about your use case please?

I want (at least) to track session id accross calls to the llm just like the original issue. Later I also plan to add conversation metrics for performance monitoring. All should be ligh weigths and simple type metadata so the "invocation_context" seems quite perfect for this.

[vblagoje]

Ok thank you @ggdupont I agree and it seems like a low impact high return PR. Let's see what the peer review says

[vblagoje]

@silvanocerza please have a look as well and luk your thoughts.

[vblagoje]

ping @silvanocerza - have a look now 🙏

[vblagoje]

Feature included in https://pypi.org/project/langfuse-haystack/0.5.0/ release onward - thanks @silvanocerza @ggdupont @kluhan

• fixes Feature request for the possibility of adding user_id to the trace while using Haystack<>Langfuse connector #916

[ggdupont]

FYI already integrated and happy of the result.