Deploy a release to all your primary origins at once

Every deployment now carries a kind, primary or preview, and a status, live or inactive. A project's primary origins are deployed as a whole: POST /deployments with targets: ["primary"] makes a release live on all of them, so they always serve the same deployment, and a rollback re-deploys to every primary origin the project has.

• Deploying the release that is already live answers 200 and writes nothing.
• expected_deployment_id guards against racing another deploy, which answers 409 with dep.conflict.
• GET /deployments lists the deployments newest first: origin narrows the list to one origin, live=true lists what is served now, and expand=release embeds the release each one made live. GET /deployments/{deployment_id} reads one.

Breaking: a deploy that names a primary origin answers 400 with dep.invalid; deploy to primary instead.

Deployments in the API reference