feat: Add stale process monitor, users route, landing page, archive old scripts

- Add backend stale process monitoring API (/api/stale-processes)
- Add users management route
- Add frontend landing page and stale process monitor UI on /scraper-tools
- Move old development scripts to backend/archive/
- Update frontend build with new features

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

backend/src/index.ts

@@ -58,6 +58,8 @@ import scheduleRoutes from './routes/schedule';
 import crawlerSandboxRoutes from './routes/crawler-sandbox';
 import versionRoutes from './routes/version';
 import publicApiRoutes from './routes/public-api';
+import usersRoutes from './routes/users';
+import staleProcessesRoutes from './routes/stale-processes';
 import { dutchieAZRouter, startScheduler as startDutchieAZScheduler, initializeDefaultSchedules } from './dutchie-az';
 import { trackApiUsage, checkRateLimit } from './middleware/apiTokenTracker';
 import { startCrawlScheduler } from './services/crawl-scheduler';
@@ -89,6 +91,8 @@ app.use('/api/parallel-scrape', parallelScrapeRoutes);
 app.use('/api/schedule', scheduleRoutes);
 app.use('/api/crawler-sandbox', crawlerSandboxRoutes);
 app.use('/api/version', versionRoutes);
+app.use('/api/users', usersRoutes);
+app.use('/api/stale-processes', staleProcessesRoutes);
 // Vendor-agnostic AZ data pipeline routes (new public surface)
 app.use('/api/az', dutchieAZRouter);
 // Legacy alias (kept temporarily for backward compatibility)