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/tsconfig.json

@@ -14,5 +14,5 @@
     "allowSyntheticDefaultImports": true
   },
   "include": ["src/**/*"],
-  "exclude": ["node_modules", "dist", "src/**/*.test.ts", "src/**/__tests__/**"]
+  "exclude": ["node_modules", "dist", "src/**/*.test.ts", "src/**/__tests__/**", "src/_deprecated/**"]
 }