Announcing Worker Versioning Public Preview: Pin Workflows to a single code version

What this post added

Introduces Worker Versioning with two behaviors: PINNED (Workflows stay on a single version) and AUTO_UPGRADE (Workflows automatically hop to new versions). Details three deployment strategies: rolling, blue-green, and rainbow, with a focus on how Worker Versioning enables safer rainbow deployments. Discusses design goals (ease of adoption, reliability, deployment safety, flexibility) and provides links to documentation, a Kubernetes Worker Controller, and a course. Outlines project status (public preview) and roadmap, including plans for GA, Pinned-until-Continue-as-New annotation, replay testing, and auto-scaling for the Worker Controller.