fix(ci): use git tag -f to handle pre-existing plain semver tag

goreleaser pushes the plain vX.Y.Z tag to the remote when it creates
the GitHub release. On retriggers, fetch-depth: 0 pulls that tag in
and the bare git tag command fails with "tag already exists". Force
flag overwrites the local alias safely — goreleaser never pushes it.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: 2 people

.github/workflows/release-engine.yml

@@ -42,7 +42,7 @@ jobs:
           # the current commit. Goreleaser reads tags but never pushes them, so
           # this won't pollute the remote. The namespaced tag (engine/vX.Y.Z) is
           # what triggered this workflow; goreleaser needs the plain vX.Y.Z form.
-          git tag "${TAG}"
+          git tag -f "${TAG}"
 
       - name: Generate NOTICE
         run: |