fix(mining-admin): 修复算力同步状态检查的 API 路径

- contribution-service: 给 /contribution/stats 接口添加 @Public() 装饰器
- mining-admin-service: 修正 API 路径从 api/v1 改为 api/v2

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

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

@@ -12,6 +12,7 @@ import {
 import { ContributionStatsResponse } from '../dto/response/contribution-stats.response';
 import { ContributionRankingResponse, UserRankResponse } from '../dto/response/contribution-ranking.response';
 import { GetContributionRecordsRequest } from '../dto/request/get-records.request';
+import { Public } from '../../shared/guards/jwt-auth.guard';
 
 @ApiTags('Contribution')
 @Controller('contribution')
@@ -24,6 +25,7 @@ export class ContributionController {
   ) {}
 
   @Get('stats')
+  @Public()
   @ApiOperation({ summary: '获取算力统计数据' })
   @ApiResponse({ status: 200, type: ContributionStatsResponse })
   async getStats(): Promise<ContributionStatsResponse> {

backend/services/mining-admin-service/src/api/controllers/config.controller.ts

@@ -48,7 +48,7 @@ export class ConfigController {
       // 并行获取 mining-service 状态和 contribution-service 总算力
       const [miningResponse, contributionResponse] = await Promise.all([
         fetch(`${miningServiceUrl}/api/v2/admin/status`),
-        fetch(`${contributionServiceUrl}/api/v1/contribution/stats`).catch(() => null),
+        fetch(`${contributionServiceUrl}/api/v2/contribution/stats`).catch(() => null),
       ]);
 
       if (!miningResponse.ok) {