[Bug]参数提取节点无法处理变量聚合的 Array/Dict 输出

### Contact Information

参数提取节点无法处理变量聚合的 Array/Dict 输出

### MaxKB Version

2.8.1

### Problem Description

Exception:unhashable type: 'dict'

### Steps to Reproduce

Exception:unhashable type: 'dict'

### The expected correct result

_No response_

### Related log output

```shell

```

### Additional Information

_No response_