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/entities/store-item.entity.ts

@@ -0,0 +1,54 @@
+import { Entity, PrimaryGeneratedColumn, Column, ManyToOne, JoinColumn, Check } from 'typeorm';
+import { License } from './license.entity';
+import { StoreCategory } from './store-category.entity';
+
+@Entity('store_items')
+@Check(`"item_type" IN ('kit', 'rank', 'currency', 'command')`)
+export class StoreItem {
+  @PrimaryGeneratedColumn('uuid')
+  id: string;
+
+  @Column({ type: 'uuid' })
+  license_id: string;
+
+  @Column({ type: 'uuid', nullable: true })
+  category_id: string | null;
+
+  @Column({ type: 'varchar', length: 200 })
+  name: string;
+
+  @Column({ type: 'text', nullable: true })
+  description: string | null;
+
+  @Column({ type: 'decimal', precision: 10, scale: 2 })
+  price: number;
+
+  @Column({ type: 'text', nullable: true })
+  image_url: string | null;
+
+  @Column({ type: 'varchar', length: 50 })
+  item_type: string;
+
+  @Column({ type: 'jsonb' })
+  delivery_commands: Record<string, any>;
+
+  @Column({ type: 'integer', nullable: true })
+  limit_per_player: number | null;
+
+  @Column({ type: 'boolean', default: true })
+  enabled: boolean;
+
+  @Column({ type: 'timestamptz', default: () => 'NOW()' })
+  created_at: Date;
+
+  @Column({ type: 'timestamptz', default: () => 'NOW()' })
+  updated_at: Date;
+
+  @ManyToOne(() => License, { onDelete: 'CASCADE' })
+  @JoinColumn({ name: 'license_id' })
+  license: License;
+
+  @ManyToOne(() => StoreCategory, { onDelete: 'SET NULL', nullable: true })
+  @JoinColumn({ name: 'category_id' })
+  category: StoreCategory | null;
+}