AWS Personalize SDK - CreateSolutionVersion command: Callback hook for when status changes to 'Active'

Currently there is not a built-in way to register a callback with asynchronous Personalize APIs such as CreateSolutionVersion. The typical integration pattern to detect when a solution version becomes "active" is to poll the DescribeSolutionVersion API, as you mentioned. Wrapping this processing in AWS Step Functions is a common way of encapsulating this functionality.

The Maintaining Personalized Experiences with Machine Learning solution provides the ability to trigger and schedule workflows around Personalize processes such as importing data, creating solutions versions, updating campaigns, running batch jobs, etc. It also fires events to Amazon EventBridge when asynchronous events complete (i.e. become "active") which you can subscribe to to trigger your own workflows.