fix: Restore hydration and product_refresh for store updates

- Moved hydration module back from _deprecated (needed for product_refresh)
- Restored product_refresh handler for processing stored payloads
- Restored geolocation service for findadispo/findagram
- Stubbed system routes that depend on deprecated SyncOrchestrator
- Removed crawler-sandbox route (deprecated)
- Fixed all TypeScript compilation errors

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/src/tasks/handlers/index.ts

@@ -4,8 +4,8 @@
  * Exports all task handlers for the task worker.
  */
 
-export { handleProductRefresh } from './product-refresh';
 export { handleProductDiscovery } from './product-discovery';
+export { handleProductRefresh } from './product-refresh';
 export { handleStoreDiscovery } from './store-discovery';
 export { handleEntryPointDiscovery } from './entry-point-discovery';
 export { handleAnalyticsRefresh } from './analytics-refresh';