feat(analytics): add Redis 24h cache to neighborhood score endpoint (TEC-3072)

The GET /neighborhoods/:district/score handler was missing Redis caching.
Adds NEIGHBORHOOD_SCORE CachePrefix + CacheTTL (24h) and wires CacheService.getOrSet
into GetNeighborhoodScoreHandler. Updates handler tests to cover cache behavior.

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

apps/api/src/modules/shared/infrastructure/cache.service.ts

@@ -45,6 +45,8 @@ export const CacheTTL = {
   MARKET_HISTORY: 21600, // 6 hours
   /** AVM valuation estimate per listing — long TTL, model outputs are stable within a day */
   VALUATION_LISTING: 86400, // 24 h
+  /** [TEC-3072] Neighborhood score — 24h TTL, POI data changes infrequently */
+  NEIGHBORHOOD_SCORE: 86400, // 24 h
 } as const;
 
 export enum CachePrefix {
@@ -67,6 +69,8 @@ export enum CachePrefix {
   TRENDING_AREAS = 'cache:analytics:trending_areas',
   PRICE_MOVERS = 'cache:analytics:price_movers',
   MARKET_HISTORY = 'cache:analytics:market_history',
+  /** [TEC-3072] Neighborhood score per district */
+  NEIGHBORHOOD_SCORE = 'cache:analytics:neighborhood_score',
 }
 
 @Injectable()