757a94557b
secrets.GITEA_TOKEN cannot authenticate to Gitea's container registry in any currently-shipped version, regardless of the permissions: block or which account triggers the workflow - confirmed via go-gitea/gitea#23642 (open since 1.19) and its fix, PR #39070, which is dated 2026-08-24 and not yet merged. Every run since switching to it has failed at docker login with a plain "unauthorized". Reverting to a manually-created PACKAGE_REGISTRY_TOKEN secret (the GITEA_PACKAGE_TOKEN attempt from before this branch used a reserved-prefix name Gitea silently refuses to create).