feat: implement background job system with queue, worker, scheduler, and handlers

- Add job queue abstraction (InMemoryQueue and Redis/BullMQ adapter)
- Add polling worker with retry logic and exponential backoff
- Add 6 job handlers: darkwatch.scan, voiceprint.batch, hometitle.scan,
  removebrokers.process, reports.generate, notifications.send
- Add cron-based scheduler with tier-appropriate frequencies
  (Basic/Plus/Premium)
- Add tRPC scheduler router for admin (runJobNow, getJobStatus, etc.)
- Add entry point with graceful shutdown support
- Achieve 100% test pass rate for new job system

web/package.json

@@ -24,9 +24,12 @@
     "@types/three": "^0.184.1",
     "@typeschema/valibot": "^0.13.4",
     "bcryptjs": "^3.0.3",
+    "bullmq": "^5.77.3",
     "drizzle-orm": "^0.45.2",
     "firebase-admin": "^13.10.0",
+    "ioredis": "^5.10.1",
     "jose": "^5",
+    "node-cron": "^4.2.1",
     "pg": "^8.21.0",
     "puppeteer": "^25.0.4",
     "resend": "^6.12.4",
@@ -42,6 +45,7 @@
     "node": ">=22"
   },
   "devDependencies": {
+    "@types/node-cron": "^3.0.11",
     "@types/pg": "^8.20.0",
     "drizzle-kit": "^0.31.10",
     "jsdom": "^29.1.1",