ci: skip creating GitHub Release if it already exists (prevent immutable-release error)

.github/workflows/auto-versioning.yml

@@ -62,8 +62,22 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
+      - name: Check for existing GitHub Release
+        id: check_release
+        run: |
+          TAG=${{ steps.create_tag.outputs.tag }}
+          echo "Checking for release for tag: ${TAG}"
+          STATUS=$(curl -s -o /dev/null -w "%{http_code}" -H "Authorization: token ${GITHUB_TOKEN}" -H "Accept: application/vnd.github+json" "https://api.github.com/repos/${GITHUB_REPOSITORY}/releases/tags/${TAG}") || true
+          if [ "${STATUS}" = "200" ]; then
+            echo "exists=true" >> $GITHUB_OUTPUT
+          else
+            echo "exists=false" >> $GITHUB_OUTPUT
+          fi
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
       - name: Create GitHub Release (tag-only, no workspace changes)
-        if: ${{ steps.semver.outputs.changed }}
+        if: ${{ steps.semver.outputs.changed && steps.check_release.outputs.exists == 'false' }}
         uses: softprops/action-gh-release@v1
         with:
           tag_name: ${{ steps.create_tag.outputs.tag }}