While an optional attribute, we have the ability to set the gen_ai.response.finish_reason span within the Anthropic integration, either through the result.stop_reason for non-streaming responses, or the event.delta.stop_reason for streaming messages.

We need to ensure that we set the gen_ai.response.finish_reason span when available in the Anthropic integration, similar to what we do for other integrations like Google, Hugging Face, and LangChain.