Add Usage Information Output to LLM Node in Workflow

[jicasada]

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1. Is this request related to a challenge you're experiencing?

Yes. While utilizing the LLM node, we noticed that there is no mechanism to output information to track the resource consumption of the node externally, or take some particularity actions.

2. Describe the feature you'd like to see

I would like to see a feature where the LLM node not only continues to produce its current outputs but also includes an additional JSON-formatted output detailing the usage statistics. The usage output that we see in the log.

3. How will this feature improve your workflow or experience?

Enable tracking of the LLM node usage through an HTTP request node.

4. Additional context or comments

Here add usage, as output

5. Can you help us with this feature?

• I am interested in contributing to this feature.