fix(kyc): 为 SubmitRealNameDto 添加 class-validator 装饰器

修复 ValidationPipe whitelist 模式下属性被过滤的问题

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/services/identity-service/src/api/controllers/kyc.controller.ts

@@ -18,7 +18,9 @@ import {
   ApiResponse,
   ApiConsumes,
   ApiBody,
+  ApiProperty,
 } from '@nestjs/swagger';
+import { IsString, IsNotEmpty, Length, Matches } from 'class-validator';
 import { KycApplicationService } from '@/application/services/kyc-application.service';
 import {
   JwtAuthGuard,
@@ -29,7 +31,18 @@ import {
 // ========== DTO 定义 ==========
 
 class SubmitRealNameDto {
+  @ApiProperty({ description: '真实姓名', example: '张三' })
+  @IsString()
+  @IsNotEmpty({ message: '姓名不能为空' })
+  @Length(2, 50, { message: '姓名长度需在2-50个字符之间' })
   realName: string;
+
+  @ApiProperty({ description: '身份证号码', example: '110101199001011234' })
+  @IsString()
+  @IsNotEmpty({ message: '身份证号不能为空' })
+  @Matches(/^[1-9]\d{5}(18|19|20)\d{2}(0[1-9]|1[0-2])(0[1-9]|[12]\d|3[01])\d{3}[\dXx]$/, {
+    message: '身份证号格式不正确',
+  })
   idCardNumber: string;
 }