fix: add missing release when creating dataset trace

[exekerey]

Hi, I love this project

Traces in custom experiments with langfuse datasets via langchain handlers have no release tag. Noticed that there was missing version argument when creating a trace. Adding missing argument resolves the issue with missing tag.

This fix is based on the v2.60.5 release tag because the function does not exist in main. Please advise if I should rebase onto a different branch or if you prefer to cherry-pick this change.

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[!IMPORTANT] Adds missing version argument to trace() call in get_langchain_handler() to fix missing release tags in traces.

• Behavior:
  • Adds missing version=self.langfuse.release argument to self.langfuse.trace() call in get_langchain_handler() in langfuse/client.py.
  • Fixes missing release tag in traces for custom experiments with Langfuse datasets via Langchain handlers.
• Context:
  • Based on v2.60.5 release tag, not present in the main branch.

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Greptile Summary

Disclaimer: Experimental PR review

Added missing version argument to trace() call in get_langchain_handler() method to ensure proper release tagging for dataset experiment traces via LangChain handlers.

• Added version=self.langfuse.release parameter to self.langfuse.trace() call in langfuse/client.py to fix missing release tags
• Change targets v2.60.5 since the function doesn't exist in main branch yet

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[hassiebp]

Thanks again for your contribution @exekerey - this is supported now in our new Langfuse SDK v3 🙏🏾