Could you consider support choose BYOK (alias key) in Dynamic Route?

### Proposed changes

Currently, Cloudflare support multiple keys but there is no way to choose it in Dynamic Route.

Please consider to support it.

Many thanks.

### Subject Matter

Choose alias key for Dynamic Route

### Content Location

https://developers.cloudflare.com/ai-gateway/configuration/bring-your-own-keys/#multiple-keys-per-provider

https://developers.cloudflare.com/ai-gateway/features/dynamic-routing/usage/

### Additional information

It is better if support:

- Select 1 alias key
- Auto rotate key
- Auto fallback
- ...