Layer secret leak guardrails

.github/workflows/secret-guardrails.yml

@@ -0,0 +1,33 @@
+name: secret-guardrails
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  artifact-secret-scan:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repo
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Make scanner executable
+        run: chmod +x scripts/scan-secret-bearing-artifacts.sh
+
+      - name: Scan all tracked infra artifacts for embedded secrets
+        run: scripts/scan-secret-bearing-artifacts.sh --tracked
+
+  gitleaks:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repo
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Run gitleaks
+        uses: gitleaks/gitleaks-action@v2
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}