issue: Usage information is not passed to the Langfuse generation

[highyield3011]

Check Existing Issues

• I have searched the existing issues and discussions.
• I am using the latest version of Open WebUI.

Installation Method

Docker

Open WebUI Version

v0.5.20

Ollama Version (if applicable)

No response

Operating System

Ubuntu 22.04

Browser (if applicable)

No response

Confirmation

• I have read and followed all instructions in README.md.
• I am using the latest version of both Open WebUI and Ollama.
• I have included the browser console logs.
• I have included the Docker container logs.
• I have listed steps to reproduce the bug in detail.

Expected Behavior

Usage information should be passed to Langfuse

Actual Behavior

Usage information is not passed to Langfuse

Steps to Reproduce

1. Integrate Open WebUI with Langfuse - https://langfuse.com/docs/integrations/openwebui
2. Start a new chat
3. Check traces in Langfuse

Logs & Screenshots

Please also refer to the reply from the author of Langfuse:
langfuse/langfuse#6299

Additional Information

No response