Recently I've been working with Step Functions in my day-to-day work, as well as in my personal projects, and I decided to write this post as a way of articulating the ins-and-outs of Step Functions I've learnt while using them. It helps that a few [https://aws.amazon.com/about-aws/whats-new/2019/05/aws-step-functions-support-callback-patterns/] new...