fix(docker): 修复 contribution-service 和 mining-admin-service Dockerfile healthcheck 路径

将 healthcheck 路径从 /api/v1/health 改为 /api/v2/health，
与 main.ts 中的 API 前缀保持一致。

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

backend/services/contribution-service/Dockerfile

@@ -45,6 +45,6 @@ ENV TZ=Asia/Shanghai
 EXPOSE 3020
 
 HEALTHCHECK --interval=30s --timeout=10s --start-period=60s --retries=3 \
-    CMD curl -f http://localhost:3020/api/v1/health || exit 1
+    CMD curl -f http://localhost:3020/api/v2/health || exit 1
 
 CMD ["/app/start.sh"]

backend/services/mining-admin-service/Dockerfile

@@ -64,7 +64,7 @@ EXPOSE 3023
 
 # 健康检查
 HEALTHCHECK --interval=30s --timeout=10s --start-period=60s --retries=3 \
-    CMD curl -f http://localhost:3023/api/v1/health || exit 1
+    CMD curl -f http://localhost:3023/api/v2/health || exit 1
 
 # 启动应用
 CMD ["/app/start.sh"]