fix(contribution-service): 添加@Public装饰器到HealthController以绕过JWT认证

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

backend/services/contribution-service/src/api/controllers/health.controller.ts

@@ -2,6 +2,7 @@ import { Controller, Get } from '@nestjs/common';
 import { ApiTags, ApiOperation, ApiResponse } from '@nestjs/swagger';
 import { PrismaService } from '../../infrastructure/persistence/prisma/prisma.service';
 import { RedisService } from '../../infrastructure/redis/redis.service';
+import { Public } from '../../shared/guards/jwt-auth.guard';
 
 interface HealthStatus {
   status: 'healthy' | 'unhealthy';
@@ -12,6 +13,7 @@ interface HealthStatus {
   };
 }
 
+@Public()
 @ApiTags('Health')
 @Controller('health')
 export class HealthController {