create tag for manual release

.github/workflows/gradle-release.yml

@@ -1,4 +1,4 @@
-name: Create Release
+name: Create Release with Manual Tag
 
 on:
   push:
@@ -7,7 +7,7 @@ on:
   workflow_dispatch:
     inputs:
       tag_name:
-        description: 'Tag name for the release (e.g., v6.09.08 for production, v6.09.08-SNAPSHOT for nightly, v6.09.08.RC1 for release candidate). Must already exist.'
+        description: 'Tag name for the release (e.g., v6.09.08 for production, v6.09.08-SNAPSHOT for nightly, v6.09.08.RC1 for release candidate). The tag will be created on the selected branch.'
         required: true
         type: string
       prerelease:
@@ -26,7 +26,33 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ inputs.tag_name || github.ref }}
+          ref: ${{ github.ref }}
+
+      - name: Create and push tag
+        if: ${{ github.event_name == 'workflow_dispatch' }}
+        env:
+          TAG_NAME: ${{ inputs.tag_name }}
+        run: |
+          if git ls-remote --exit-code --tags origin "refs/tags/${TAG_NAME}" > /dev/null 2>&1; then
+            echo "::error::Tag '${TAG_NAME}' already exists on the remote."
+            echo ""
+            echo "========================================="
+            echo " HOW TO FIX"
+            echo "========================================="
+            echo ""
+            echo "If you want to re-release this tag, delete it first:"
+            echo "  git tag -d ${TAG_NAME}"
+            echo "  git push origin :refs/tags/${TAG_NAME}"
+            echo ""
+            echo "Then re-run this workflow."
+            echo "========================================="
+            exit 1
+          fi
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git tag "${TAG_NAME}"
+          git push origin "${TAG_NAME}"
+          echo "✅ Tag '${TAG_NAME}' created and pushed from $(git rev-parse --short HEAD) on branch ${GITHUB_REF_NAME}."
 
       - name: Validate tag matches gradle.properties version
         run: |