feat: [SEC-7263] Add dependency-scan GitHub Actions workflow

- Add dependency-scan workflow for Node.js SBOM generation
- Include policy evaluation for license compliance
- Use private repository workflow pattern with common-actions

Co-Authored-By: Patrick Kaeding <patrick@kaeding.name>

Author: devin-ai-integration[bot]

.github/workflows/dependency-scan.yml

@@ -0,0 +1,32 @@
+name: Dependency Scan
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+
+jobs:
+  generate-sbom:
+    runs-on: ${{ github.run_id }}/runner=ubuntu22-2cpu-8gb-x64
+    steps:
+      - uses: runs-on/action@cd2b598b0515d39d78c38a02d529db87d2196d1e # v2.0.3
+      - uses: launchdarkly/common-actions/init@main
+
+      - name: Generate SBOM
+        uses: launchdarkly/common-actions/dependency-scan/generate-sbom@main
+        with:
+          types: 'nodejs'
+
+  evaluate-policy:
+    runs-on: ${{ github.run_id }}/runner=ubuntu22-2cpu-8gb-x64
+    needs:
+      - generate-sbom
+    steps:
+      - uses: runs-on/action@cd2b598b0515d39d78c38a02d529db87d2196d1e # v2.0.3
+      - uses: launchdarkly/common-actions/init@main
+
+      - name: Evaluate SBOM Policy
+        uses: launchdarkly/common-actions/dependency-scan/evaluate-policy@main
+        with:
+          artifacts-pattern: bom-*