Two tagged release pipelines failed and no installer has been published since
1.1.0. The cause is not in the build: the release repository has no Actions
secrets at all, so every run stops at the signing guard.
A helper now reports which release secrets are missing and registers them once
the signing material exists, and the release guide documents the required
values, the Forgejo-side check, and how to re-run a pipeline for an existing
tag without recreating it.
