fix: 修复工作流公共 API 调用问题

- 限制远程文档仅访问公网地址并校验重定向目标

- 统一访问令牌 401/403 与过期执行状态 404 语义

- 校正节点查询参数和工作流状态文档

easyflow-api/easyflow-api-public/src/main/java/tech/easyflow/publicapi/interceptor/PublicApiInterceptor.java

@@ -25,8 +25,9 @@ public class PublicApiInterceptor implements HandlerInterceptor {
         String requestURI = request.getRequestURI();
         String apiKey = request.getHeader("ApiKey");
 
-        if (apiKey == null || apiKey.isEmpty()) {
+        if (apiKey == null || apiKey.isBlank()) {
             Result<Void> failed = Result.fail(401, "密钥不正确");
+            response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
             ResponseUtil.renderJson(response, failed);
             return false;
         }