* ci: refactor workflows to use reusable artcraft-common-actions
* ci: point reusable workflows to storytold/craft-common-actions
* ci: pin storytold/craft-common-actions to commit 27a978f and pass secrets explicitly
* ci: use @main (unpinned) for craft-common-actions with explanation comment
Release, FreeBSD and Windows ARM64 builds no longer run on main, PRs or a
schedule; every build job checks for refs/heads/release so a manual run
from another branch is skipped.
Co-Authored-By: Claude Opus 5.5 <[email protected]>