feat: real-time live data integration

- lib/live-data.ts: Shared TypeScript client for blackroad-live-data Worker
- components/live-stats.tsx: LiveStatsBar, RecentRepos, AgentStatusGrid components
- app/page.tsx: Import LiveStatsBar in main page header

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

.github/workflows/blackroad-auto-merge.yml

@@ -26,7 +26,7 @@ jobs:
 
     steps:
       - name: 📥 Checkout Repository
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+        uses: actions/checkout@v4
 
       - name: 🔍 Get PR Details
         id: pr