OptionalaiEndpoint: stringRefine an existing proposal based on new instructions. Stub implementation returns null.
Publishers should override this to implement:
Clean up expired proposals. Returns the number of proposals removed.
Check if proposal generation is supported. Override this to return true when implementing real logic.
Generate proposals for a get_products request. Stub implementation returns empty array.
Publishers should override this to implement:
Example of an AI-powered proposal manager (stub). Shows how publishers might extend the base class.