[FEATURE] Result includes llm token usage along with the response

[LuisFX]

API call result object would include the token utilization For accounting reasons, it would be useful to get the token utilization for each call. Akin to what openai includes along other metadata.

[severfire]

I do agree, It would be great to get in in all models. I would use it in VertexAI model.

[bendadaniel]

This is must have feature, it is rly hard to use flowine in production without option to know how much user spend @HenryHengZJ

[RepairYourTech]

Is this being considered yet or should I seek alternative builders for production