Switch publish-containers workflow from workflow_run to direct v* tag triggers,
remove obsolete workflow_run logic, simplify version detection via GITHUB_REF_NAME,
and keep stable-tag detection aligned with the stable ref.
https://chatgpt.com/share/693c836b-0b00-800f-9536-9e273abd0fb5
Introduce a dedicated publish-containers workflow triggered after stable releases.
Unify container build and publish logic via scripts, add buildx-based multi-tag publishing,
default base image resolution, and Arch alias tags for latest/version/stable.
https://chatgpt.com/share/693c836b-0b00-800f-9536-9e273abd0fb5