feat(analytics): integrate AI/ML services — AVM endpoint, moderation pipeline, market index cron

- Add AiServiceClient HTTP client for Python FastAPI AI service with timeout and fallback
- Add HttpAVMService that calls Python AVM endpoint, falls back to PrismaAVMService on failure
- Add ListingCreatedModerationHandler: auto-flags suspicious listings via AI moderation on create
- Add MarketIndexCronService: daily cron job aggregating market stats per district/city/type
- Wire ScheduleModule and new providers into AnalyticsModule and AppModule
- Add unit tests for AiServiceClient, HttpAVMService, and moderation handler (all passing)

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

apps/api/src/modules/analytics/analytics.module.ts

@@ -3,6 +3,7 @@ import { CqrsModule } from '@nestjs/cqrs';
 import { GenerateReportHandler } from './application/commands/generate-report/generate-report.handler';
 import { TrackEventHandler } from './application/commands/track-event/track-event.handler';
 import { UpdateMarketIndexHandler } from './application/commands/update-market-index/update-market-index.handler';
+import { ListingCreatedModerationHandler } from './application/event-handlers/listing-created-moderation.handler';
 import { GetDistrictStatsHandler } from './application/queries/get-district-stats/get-district-stats.handler';
 import { GetHeatmapHandler } from './application/queries/get-heatmap/get-heatmap.handler';
 import { GetMarketReportHandler } from './application/queries/get-market-report/get-market-report.handler';
@@ -13,6 +14,9 @@ import { VALUATION_REPOSITORY } from './domain/repositories/valuation.repository
 import { AVM_SERVICE } from './domain/services/avm-service';
 import { PrismaMarketIndexRepository } from './infrastructure/repositories/prisma-market-index.repository';
 import { PrismaValuationRepository } from './infrastructure/repositories/prisma-valuation.repository';
+import { AI_SERVICE_CLIENT, AiServiceClient } from './infrastructure/services/ai-service.client';
+import { HttpAVMService } from './infrastructure/services/http-avm.service';
+import { MarketIndexCronService } from './infrastructure/services/market-index-cron.service';
 import { PrismaAVMService } from './infrastructure/services/prisma-avm.service';
 import { AnalyticsController } from './presentation/controllers/analytics.controller';
 
@@ -30,19 +34,33 @@ const QueryHandlers = [
   GetValuationHandler,
 ];
 
+const EventHandlers = [
+  ListingCreatedModerationHandler,
+];
+
 @Module({
   imports: [CqrsModule],
   controllers: [AnalyticsController],
   providers: [
+    // AI service client
+    { provide: AI_SERVICE_CLIENT, useClass: AiServiceClient },
+
     // Repositories
     { provide: MARKET_INDEX_REPOSITORY, useClass: PrismaMarketIndexRepository },
     { provide: VALUATION_REPOSITORY, useClass: PrismaValuationRepository },
-    { provide: AVM_SERVICE, useClass: PrismaAVMService },
+
+    // AVM: HttpAVMService calls Python AI first, falls back to PrismaAVMService
+    PrismaAVMService,
+    { provide: AVM_SERVICE, useClass: HttpAVMService },
+
+    // Cron
+    MarketIndexCronService,
 
     // CQRS
     ...CommandHandlers,
     ...QueryHandlers,
+    ...EventHandlers,
   ],
-  exports: [MARKET_INDEX_REPOSITORY, VALUATION_REPOSITORY, AVM_SERVICE],
+  exports: [MARKET_INDEX_REPOSITORY, VALUATION_REPOSITORY, AVM_SERVICE, AI_SERVICE_CLIENT],
 })
 export class AnalyticsModule {}