openssf: Move openssf-scorecard.yml into .github/workflows

.github/workflows/openssf-scorecard.yml

@@ -0,0 +1,49 @@
+# Upstream https://github.com/ossf/scorecard/blob/main/.github/workflows/scorecard-analysis.yml
+# Tweaked to not pin actions by SHA digest as I think that's overkill noisy security theater.
+name: OpenSSF Scorecard analysis
+on:
+  push:
+    branches:
+      - main
+
+permissions: read-all
+
+jobs:
+  analysis:
+    name: Scorecard analysis
+    runs-on: ubuntu-24.04
+    permissions:
+      # Needed for Code scanning upload
+      security-events: write
+      # Needed for GitHub OIDC token if publish_results is true
+      id-token: write
+
+    steps:
+      - name: "Checkout code"
+        uses: actions/checkout@v6
+        with:
+          persist-credentials: false
+
+      - name: "Run analysis"
+        uses: ossf/[email protected]
+        with:
+          results_file: results.sarif
+          results_format: sarif
+          # Scorecard team runs a weekly scan of public GitHub repos,
+          # see https://github.com/ossf/scorecard#public-data.
+          # Setting `publish_results: true` helps us scale by leveraging your workflow to
+          # extract the results instead of relying on our own infrastructure to run scans.
+          # And it's free for you!
+          publish_results: true
+
+      - name: "Upload artifact"
+        uses: actions/upload-artifact@v5
+        with:
+          name: SARIF file
+          path: results.sarif
+          retention-days: 5
+
+      - name: "Upload to code-scanning"
+        uses: github/codeql-action/upload-sarif@v4
+        with:
+          sarif_file: results.sarif