## Summary

Add Cloudflare Workers AI audio support to LiteLLM's `cloudflare` provider.

## Scope

- speech-to-text and transcription models - text-to-speech models - Cloudflare's native Workers AI run endpoint and relevant streaming/binary response formats - request and response transformation into LiteLLM's standard audio APIs - provider capability metadata, tests, and documentation

This groups the Cloudflare audio modalities into one follow-up and keeps #21115 focused on embeddings and reranking.

## References

- https://developers.cloudflare.com/workers-ai/models/?tasks=Automatic-Speech-Recognition - https://developers.cloudflare.com/workers-ai/models/?tasks=Text-to-Speech - https://developers.cloudflare.com/api/resources/ai/methods/run/

If anyone is interested in taking this on, help would be appreciated.