Get Public Retriever Config

Get display configuration for public page rendering. ⚠️ DEPRECATED: Use `/v1/marketplace/catalog/{public_name}/config` instead. This endpoint is maintained for backwards compatibility but may be removed in the future. Returns the UI configuration needed to render the public search interface. Used by the frontend app at mxp.co to dynamically build the UI. Authentication: - NO authentication required - this endpoint is public - Anyone can access the config if they know the public_name - The config includes the public_api_key needed for execute/interact endpoints Response includes: - Display config (logo, theme, components, field rendering) - Title and description - Password protection status - Public API key for subsequent authenticated requests Example (deprecated): ```bash curl -X GET "https://api.mixpeek.com/v1/public/retrievers/video-search/config" ``` Example (recommended): ```bash curl -X GET "https://api.mixpeek.com/v1/marketplace/catalog/video-search/config" ```