fix: 为AnthropicHandles添加MaxTokens有效性校验

Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Domain/YiFrameworkAiHubDomainModule.cs

@@ -106,7 +106,13 @@ namespace Yi.Framework.AiHub.Domain
                         request.MaxTokens = 16384;
                     }
                 });
-                options.AnthropicHandles.add(request => { });
+                options.AnthropicHandles.add(request =>
+                {
+                    if (request.MaxTokens is null || request.MaxTokens <= 0)
+                    {
+                        throw new UserFriendlyException("MaxTokens must be greater than or equal to 0");
+                    }
+                });
             });