chore: import upstream snapshot with attribution

.github/workflows/security.yml

@@ -0,0 +1,60 @@
+name: Security Scan
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+  schedule:
+    # Weekly scan every Monday at 06:00 UTC
+    - cron: '0 6 * * 1'
+
+permissions:
+  contents: read
+
+jobs:
+  codeql:
+    name: CodeQL Analysis
+    runs-on: ubuntu-latest
+    permissions:
+      security-events: write
+      actions: read
+      contents: read
+    strategy:
+      fail-fast: false
+      matrix:
+        language:
+          - javascript-typescript
+          - python
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v7
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v3
+        with:
+          languages: ${{ matrix.language }}
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v3
+        with:
+          category: "/language:${{ matrix.language }}"
+
+  dependency-review:
+    name: Dependency Review
+    runs-on: ubuntu-latest
+    # Dependency review only runs on pull requests.
+    if: github.event_name == 'pull_request'
+    permissions:
+      contents: read
+      pull-requests: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v7
+
+      - name: Dependency Review
+        uses: actions/dependency-review-action@v4
+        with:
+          comment-summary-in-pr: on-failure