chore: add vulnerability triage workflow

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: msukkari

.github/workflows/vulnerability-triage.yml

@@ -0,0 +1,11 @@
+name: Vulnerability Triage
+
+on:
+  schedule:
+    - cron: '0 13 * * *'
+  workflow_dispatch:
+
+jobs:
+  triage:
+    uses: sourcebot-dev/sourcebot/.github/workflows/trivy-vulnerability-triage.yml@main
+    secrets: inherit