That means the update is done, and the changelog is done being written, it’s now just being edited! Update could still be today!!
not necessarily, they haven't released a stable update on the qa_stable branch, so it's probably at the very least on feature freeze. Probably ironing out bugs as we speak.
thats only after the update is released, it is a stable development version, which means its a release candidate...otherwise whats the point of having a dev-only copy of the public branch on the same version?
most builds that were uploaded to that branch were not ever seen in a public branch. However, after an update is released, they are synched, as it is the latest stable development version