Yes, I've added the license.

Thanks for sharing your work Deepak, you have some pretty extensive documentation! Funnily enough, the Golang framework is almost a clone of https://github.com/flipkart-incubator/databuilderframework (another orchestration engine in Java).

This is another HN post that extensively covers almost every major orchestrator in the market: https://news.ycombinator.com/item?id=24216317

As for multi version workflows, I suppose that will have to be a tradeoff between maintaining somewhat redundant code or adding workflows as WorkflowV1 and WorkflowV2 and stitching together relevant steps in respective versions (reduces redundancy to some extent but won't eliminate)