Key prefix for additional prompt token count details. Each detail should be a separate attribute
with this prefix, e.g. llm.token_count.prompt_details.reasoning, llm.token_count.prompt_details.audio.
All values should be in tokens (integer count of tokens).
Key prefix for additional prompt token count details. Each detail should be a separate attribute with this prefix, e.g. llm.token_count.prompt_details.reasoning, llm.token_count.prompt_details.audio. All values should be in tokens (integer count of tokens).