## CHANGES
- Add DigitalOcean as a new AI provider in plugin registry
- Implement DigitalOcean client with OpenAI-compatible inference endpoint
- Support model access key authentication for inference requests
- Add optional control plane token for model discovery
- Create DigitalOcean setup documentation with environment variables
- Update README to list DigitalOcean in supported providers
- Handle model listing via control plane API with fallback
