[Bug]:In sandbox mode, the tool cannot obtain type-safe custom context types.

[lldacing]

Describe the bug
harness 升级到2.0版本后，启用沙箱时，注册的工具中获取不到类型安全上下文对象，debug发现是因为在io.agentscope.harness.agent.HarnessAgent#ensureSessionDefaults中没有复制相关属性

After upgrading Harness to version 2.0, when sandbox mode is enabled, type-safe context objects cannot be retrieved from registered tools; debugging reveals that the issue lies in io.agentscope.harness.agent.HarnessAgent#ensureSessionDefaults, which fails to copy the relevant properties.

To Reproduce

@Component
public class CustomTools {
   @Resource
   private CommonToolSet commonToolSet;
    
    @Tool(name = "upload_output_files",
          description = "上传沙箱中的输出文件到云存储")
    public String uploadOutputFiles(
            @ToolParam(name = "file_paths",
                       description = "要上传的文件路径列表，相对于工作区根目录")
            List<String> filePaths,
            RuntimeContext runtimeContext,
            ToolCallContext tcc
    ) {
        // tcc is null，这里获取到的是null
        return commonToolSet.uploadToOss(filePaths, plan, tcc, runtimeContext);
    }
}

Toolkit toolkit = new Toolkit();
toolkit.registerTool(customTools);

DockerFilesystemSpec dockerSpec = new DockerFilesystemSpec();
        dockerSpec.image("agentscope/runtime-sandbox-base:latest");
        dockerSpec.memorySizeBytes(64L * 1024 * 1024);  // 64MB
        dockerSpec.cpuCount(2L);
        dockerSpec.snapshotSpec(snapshotSpec != null ? snapshotSpec : new NoopSnapshotSpec());
        dockerSpec.isolationScope(IsolationScope.SESSION);
        dockerSpec.environment(Map.of("TZ", "Asia/Shanghai"));
        dockerSpec.network("bridge");  // 默认 none 无网络，改为 bridge 允许容器访问外网（下载图片等）
        // dockerSpec.client(new DockerCpSandboxClient()); 自定义实现docker cp解决过长文件名过长问题

        ExecutionConfig toolConfig = ExecutionConfig.builder()
                                                    .timeout(Duration.ofMinutes(30))
                                                    .maxAttempts(2)
                                                    .build();

        HarnessAgent.Builder builder = HarnessAgent.builder()
                .name(name)
                .sysPrompt(sysPrompt)
                .model(model)
                .toolkit(toolkit)
                .toolExecutionConfig(toolConfig)
                .middlewares(middlewares)
                .maxIters(maxIters)
                .filesystem(dockerSpec)
                .sandboxDistributed(SandboxDistributedOptions.builder()
                        .requireDistributed(false).build());

# custom object
ToolCallContext toolCallContext = new ToolCallContext();
RuntimeContext runtimeContext = RuntimeContext.builder()
                .sessionId(session.getSessionId())
                .put(ToolCallContext.class, toolCallContext)
                .build();
builder.build().call(List.of(userMsg), runtimeContext).block();

Expected behavior
tcc is not null
应该能获取到put的ToolCallContext实例

Error messages
Detailed error messages.

Environment (please complete the following information):

• AgentScope-Java Version: 2.0.0-RC1
• Java Version: 17
• OS: windows

Additional context
Add any other context about the problem here.