[New Group Chat Orchestration] LLM Prompt usage not available in metadata of the orchestration result

[sushaanttb]

Unlike general metadata field with LLM prompts usage info which is available in ChatMessageContent objects, same is not available in the final response from the new group chat orchestration result.

Please suggest how to get the LLM prompt usage metadata for the final response from orchestration?

This is required for observability of my orchestration component.