Tag a patch release when license data updates on main

.github/workflows/tag-release.yml

@@ -0,0 +1,57 @@
+name: Tag Release
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - licenses.json
+  workflow_dispatch: # Allow manual trigger
+
+permissions: {}
+
+concurrency:
+  group: tag-release
+  cancel-in-progress: false
+
+jobs:
+  tag:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          fetch-depth: 0
+          persist-credentials: false
+
+      - name: Compute next version
+        id: version
+        run: |
+          latest=$(git tag --list 'v*' --sort=-v:refname | head -n 1)
+          if [ -z "$latest" ]; then
+            echo "No existing v* tags found"
+            exit 1
+          fi
+
+          if [ "$(git rev-parse "$latest^{commit}")" = "$GITHUB_SHA" ]; then
+            echo "HEAD is already tagged as $latest"
+            echo "skip=true" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+
+          IFS=. read -r major minor patch <<< "${latest#v}"
+          next="v${major}.${minor}.$((patch + 1))"
+          echo "next=$next" >> "$GITHUB_OUTPUT"
+          echo "Tagging $next (previous: $latest)"
+
+      - name: Create tag
+        if: steps.version.outputs.skip != 'true'
+        env:
+          GH_TOKEN: ${{ github.token }}
+          NEXT: ${{ steps.version.outputs.next }}
+        run: |
+          gh api "repos/$GITHUB_REPOSITORY/git/refs" \
+            -f ref="refs/tags/$NEXT" \
+            -f sha="$GITHUB_SHA"