Have you considered supporting the reasoning_content field for the Deepseek R1 model in the ChatCompletionMessage and ChatCompletionStreamChoiceDelta structs?

such as

<img width="911" alt="Image" src="https://github.com/user-attachments/assets/ea427257-42a1-48c0-8861-8c8db11052a2" />

<img width="572" alt="Image" src="https://github.com/user-attachments/assets/9d4d90f7-e46b-41d7-b9a0-0b02de54a75e" />