feat(client): LangfuseBaseCallbackHandler allow tags has non-str element (number, None, etc)

[XenoAmess]

[!IMPORTANT] LangfuseBaseCallbackHandler now converts tags to strings, allowing non-string elements.

• Behavior:
  • In LangfuseBaseCallbackHandler.__init__, tags are now converted to strings, allowing non-string elements (e.g., numbers, None).

^{This description was created by for 4cd66508c4becb6646c689c2a77abc68441d93b4. It will automatically update as commits are pushed.}

Greptile Summary

Disclaimer: Experimental PR review

Modified the LangfuseBaseCallbackHandler class to ensure all tags are converted to strings, preventing type errors when non-string elements (numbers, None, etc.) are included in the tags list.

• Changed self.tags = tags to self.tags = [str(tag) for tag in tags] if tags else None in langfuse/utils/base_callback_handler.py
• Prevents type errors when processing tags with mixed data types in the Langfuse SDK
• Maintains backward compatibility while improving robustness
• Handles the case when tags is None by setting self.tags to None
• Ensures consistent tag formatting for the Langfuse API

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[CLAassistant]

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[hassiebp]

Thanks again for raising this! Closing this PR as stale / no longer relevant with Python SDK v3. If you continue to encounter this issue, please open a Github issue for us to continue the discussion there