feat: add OSSF Scorecard GitHub Actions workflow

.github/workflows/ossf-scorecard.yml

@@ -0,0 +1,36 @@
+name: ossf-scorecard
+
+on:
+  schedule:
+    - cron: '30 1 * * 1'
+  push:
+    branches:
+      - develop
+      - main
+
+permissions: read-all
+
+jobs:
+  analysis:
+    name: ossf-scorecard
+    runs-on: ubuntu-latest
+    permissions:
+      security-events: write
+      id-token: write
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+      - uses: ossf/scorecard-action@4eaacf0543bb3f2c246792bd56e8cdeffafb205a # v2.4.3
+        with:
+          results_file: results.sarif
+          results_format: sarif
+          publish_results: true
+      - uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
+        with:
+          name: ossf-scorecard-results
+          path: results.sarif
+          retention-days: 5
+      - uses: github/codeql-action/upload-sarif@38697555549f1db7851b81482ff19f1fa5c4fedc # v4.34.1
+        with:
+          sarif_file: results.sarif

scripts/checks/verify_supply_chain.py

@@ -16,6 +16,7 @@
     Path(".github/workflows/release.yml"),
     Path(".github/workflows/secret-scan-gate.yml"),
     Path(".github/workflows/build-baseline.yml"),
+    Path(".github/workflows/ossf-scorecard.yml"),
     Path("docs/security/dependency-policy.md"),
     Path("docs/security/sbom-policy.md"),
     Path("docs/security/code-security.md"),
@@ -156,6 +157,15 @@ def verify_workflow_coverage() -> list[str]:
         missing.append(
             "build workflow should not rely on macos-latest for architecture coverage"
         )
+    scorecard = read_workflow(
+        Path(".github/workflows/ossf-scorecard.yml"), "ossf scorecard", missing
+    )
+    if scorecard:
+        missing.extend(
+            f"ossf scorecard workflow missing token: {token}"
+            for token in ["develop", "main", "push", "schedule", "ossf-scorecard"]
+            if token not in scorecard
+        )
     return missing