ci: add CodeQL and Trivy container scanning

.github/workflows/build.yml

@@ -171,6 +171,7 @@ jobs:
     permissions:
       contents: read
       packages: write
+      security-events: write
 
     steps:
       - name: Checkout repository
@@ -223,3 +224,17 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
+
+      - name: Trivy container scan
+        uses: aquasecurity/trivy-action@0.35.0
+        with:
+          scan-type: fs
+          scan-ref: .
+          format: sarif
+          output: trivy-results.sarif
+
+      - name: Upload Trivy results to GitHub Security tab
+        uses: github/codeql-action/upload-sarif@v4
+        if: always() && github.event.pull_request.head.repo.full_name == github.repository
+        with:
+          sarif_file: trivy-results.sarif

.github/workflows/codeql.yml

@@ -0,0 +1,30 @@
+name: CodeQL
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+  schedule:
+    - cron: "0 6 * * 1" # weekly on Monday
+
+jobs:
+  analyze:
+    runs-on: ubuntu-latest
+    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository
+
+    permissions:
+      security-events: write
+      contents: read
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v6
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v4
+        with:
+          languages: javascript-typescript
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v4