Use "prompt_cache_retention" for OpenAI nodes

The idea is:

Being able to use “prompt_cache_retention” property on OpenAI node.

My use case:

I want to have faster responses and pay less for AI usage.

I think it would be beneficial to add this because:

Faster and cheaper OpenAI node execution

Any resources to support this?

https://platform.openai.com/docs/guides/prompt-caching#configure-per-request

Are you willing to work on this?

I would like to, yes.