feat(cache): implement Redis caching for search & analytics hot paths

- Add TTL-specific cache durations: district stats (5min), market report (15min), heatmap (5min)
- Add Redis caching to GeoSearch handler with 60s TTL
- Add cache invalidation on listing.approved, listing.updated, listing.deactivated, listing.sold events
- Invalidate search, geo_search, and all analytics cache prefixes on listing state changes
- Update tests for new CacheService dependency in event handler and geo-search handler

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/web/package.json

@@ -27,11 +27,17 @@
     "zustand": "^5.0.12"
   },
   "devDependencies": {
+    "@testing-library/jest-dom": "^6.9.1",
+    "@testing-library/react": "^16.3.2",
+    "@testing-library/user-event": "^14.6.1",
     "@types/mapbox-gl": "^3.5.0",
     "@types/node": "^25.5.2",
     "@types/react": "^18.3.0",
     "@types/react-dom": "^18.3.0",
+    "@vitejs/plugin-react": "^4.7.0",
     "autoprefixer": "^10.4.0",
+    "jsdom": "^29.0.2",
+    "msw": "^2.13.2",
     "postcss": "^8.4.0",
     "tailwindcss": "^3.4.0",
     "tailwindcss-animate": "^1.0.7",