feat: add Playwright-based fallback scraper

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013gwc3aCiyQxmCWQke8RvEz

package.json

@@ -15,7 +15,8 @@
     "express": "^4.19.2",
     "express-basic-auth": "^1.2.1",
     "node-cron": "^3.0.3",
-    "nodemailer": "^6.9.14"
+    "nodemailer": "^6.9.14",
+    "playwright": "^1.63.0"
   },
   "devDependencies": {
     "supertest": "^7.0.0"