Create Keyframe

Create a new keyframe for a scene. Similar to generating assets, but creates a keyframe for the scene. Changes are propagated to clients via Supabase Realtime CDC.

Args: project_id: Project ID scene_id: Scene ID to add the keyframe to prompt: Text description of the keyframe to generate files: Optional list of reference images current_user: Authenticated user db: Database session

Returns: Created keyframe data with image URL