ci: add OpenSSF Scorecard workflow

.github/workflows/scorecard.yml

@@ -0,0 +1,48 @@
+name: OpenSSF Scorecard
+
+on:
+  push:
+    branches:
+      - main
+  schedule:
+    # Weekly Monday 06:15 UTC
+    - cron: "15 6 * * 1"
+  workflow_dispatch:
+
+permissions: read-all
+
+env:
+  ARCHGATE_TELEMETRY: "0"
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  analysis:
+    name: Scorecard Analysis
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    permissions:
+      security-events: write
+      id-token: write
+      contents: read
+      actions: read
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+        with:
+          persist-credentials: false
+
+      - name: Run OpenSSF Scorecard
+        uses: ossf/scorecard-action@f49aabe0b5af0936a0987cfb85d86b75731b0186 # v2.4.1
+        with:
+          results_file: results.sarif
+          results_format: sarif
+          publish_results: true
+
+      - name: Upload SARIF to GitHub Security tab
+        uses: github/codeql-action/upload-sarif@60168efe1c415ce0f5521ea06d5c2062adbeed1b # v3.28.17
+        with:
+          sarif_file: results.sarif