fix: overwrite existing git tag on deploy retry

The deploy workflow failed when re-running with the same version tag
because Git rejects pushing a tag that already exists on the remote.

- Delete local tag first (ignore if missing)
- Delete remote tag first (ignore if missing)
- Create and push the tag fresh

This makes deploys idempotent: retrying a failed deploy with the same
version (e.g., v0.1.0) will succeed by moving the tag to the current
commit. For a new deploy, the delete commands silently do nothing.

.forgejo/workflows/deploy.yml

@@ -22,6 +22,8 @@ jobs:
 
       - name: Tag version
         run: |
+          git tag -d ${{ github.event.inputs.version }} 2>/dev/null || true
+          git push origin --delete ${{ github.event.inputs.version }} 2>/dev/null || true
           git tag ${{ github.event.inputs.version }}
           git push origin ${{ github.event.inputs.version }}