[Feature Request]: Indexing cost

[MarkusGutjahr]

Do you need to file an issue?

• [X] I have searched the existing issues and this feature is not already filed.
• [X] My model is hosted on OpenAI or Azure. If not, please look at the "model providers" issue and don't file a new one here.
• [X] I believe this is a legitimate feature request, not just a question. If this is a question, please use the Discussions area.

Is your feature request related to a problem? Please describe.

I'm able to track the token consumption for querying, but i don't know how to track the cost of the indexing process.

Describe the solution you'd like

Any way to track the indexing cost, workarounds would also be fine.

Additional context

No response