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/servers/dto/send-command.dto.ts

@@ -0,0 +1,12 @@
+import { IsString, IsNotEmpty } from 'class-validator';
+import { ApiProperty } from '@nestjs/swagger';
+
+export class SendCommandDto {
+  @ApiProperty({
+    example: 'say "Hello, players!"',
+    description: 'Console command to execute on the server',
+  })
+  @IsString()
+  @IsNotEmpty()
+  command: string;
+}

backend-nest/src/modules/servers/dto/update-config.dto.ts

@@ -0,0 +1,56 @@
+import { IsOptional, IsString, IsInt, IsBoolean } from 'class-validator';
+import { ApiPropertyOptional } from '@nestjs/swagger';
+
+export class UpdateServerConfigDto {
+  @ApiPropertyOptional({ example: 'My Rust Server', description: 'Server name' })
+  @IsOptional()
+  @IsString()
+  server_name?: string;
+
+  @ApiPropertyOptional({ example: 100, description: 'Maximum players' })
+  @IsOptional()
+  @IsInt()
+  max_players?: number;
+
+  @ApiPropertyOptional({ example: 4000, description: 'World size' })
+  @IsOptional()
+  @IsInt()
+  world_size?: number;
+
+  @ApiPropertyOptional({ example: 123456, description: 'Current world seed' })
+  @IsOptional()
+  @IsInt()
+  current_seed?: number;
+
+  @ApiPropertyOptional({ example: true, description: 'Enable auto-restart' })
+  @IsOptional()
+  @IsBoolean()
+  auto_restart_enabled?: boolean;
+
+  @ApiPropertyOptional({ example: '0 4 * * *', description: 'Auto-restart cron schedule' })
+  @IsOptional()
+  @IsString()
+  auto_restart_cron?: string;
+
+  @ApiPropertyOptional({ example: true, description: 'Enable crash recovery' })
+  @IsOptional()
+  @IsBoolean()
+  crash_recovery_enabled?: boolean;
+
+  @ApiPropertyOptional({ example: true, description: 'Eligible for force wipes' })
+  @IsOptional()
+  @IsBoolean()
+  force_wipe_eligible?: boolean;
+
+  @ApiPropertyOptional({ example: true, description: 'Auto-update on force wipe' })
+  @IsOptional()
+  @IsBoolean()
+  auto_update_on_force_wipe?: boolean;
+
+  @ApiPropertyOptional({
+    example: { 'server.pve': 'true', 'server.radiation': 'false' },
+    description: 'Server config overrides (key-value pairs)',
+  })
+  @IsOptional()
+  config_overrides?: Record<string, string>;
+}