fix(client): do not escape url param with httpx > 0.28

[hassiebp]

Important

Fix URL parameter encoding in client.py for compatibility with httpx version 0.28+ by modifying _url_encode function.

• Behavior:
  • Modify _url_encode in client.py to skip re-quoting URL parameters if httpx version is 0.28 or higher.
  • Adds is_url_param argument to _url_encode to control this behavior.
• Compatibility:
  • Ensures compatibility with httpx version 0.28+ by checking httpx.__version__.
• Misc:
  • Import Version from packaging.version in client.py.

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Greptile Summary

Disclaimer: Experimental PR review

Fixed URL parameter encoding compatibility issue with httpx >0.28 in the Python SDK to prevent double-encoding of URL parameters.

• Modified _url_encode method in langfuse/_client/client.py to avoid double URL encoding, as httpx >0.28 now handles WHATWG-compliant encoding internally
• Change ensures proper handling of special characters in API request URLs across different httpx versions

[greptile-apps]

LGTM

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