feat: Complete NestJS backend scaffold — 22 modules, 39 entities, WebSocket gateway

Full backend rewrite from Rust/Axum to NestJS/TypeScript.
- 22 feature modules (auth, servers, wipes, maps, plugins, players, console,
  chat, team, notifications, settings, schedules, analytics, alerts, status,
  store, webstore, admin, setup, migration, users, licenses)
- 39 TypeORM entities matching PostgreSQL schema (12 migrations)
- Common infrastructure: JWT/RBAC guards, decorators, exception filter
- NATS service with pub/sub/request-reply
- Socket.IO WebSocket gateway with NATS bridge
- Docker: NestJS Dockerfile + updated docker-compose.yml
- Zero compile errors (npx tsc --noEmit clean)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend-nest/src/modules/alerts/alerts.module.ts

@@ -0,0 +1,14 @@
+import { Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { AlertsController } from './alerts.controller';
+import { AlertsService } from './alerts.service';
+import { AlertConfig } from '../../entities/alert-config.entity';
+import { AlertHistory } from '../../entities/alert-history.entity';
+
+@Module({
+  imports: [TypeOrmModule.forFeature([AlertConfig, AlertHistory])],
+  controllers: [AlertsController],
+  providers: [AlertsService],
+  exports: [AlertsService],
+})
+export class AlertsModule {}