[Bug] [AWEL] Knowledge Space Operator rerank启用不生效

[houxin527464]

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• I had searched in the issues and found no similar issues.

Operating system information

MacOS(M1, M2...)

Python version information

=3.11

DB-GPT version

main

Related scenes

• Chat Data
• Chat Excel
• Chat DB
• Chat Knowledge
• Model Management
• Dashboard
• Plugins

Installation Information

• Installation From Source

• Docker Installation

• Docker Compose Installation

• Cluster Installation

• AutoDL Image

• Other

Device information

CPU

Models information

LLM: qwen2.5:7b

What happened

awel 工作流编辑时，针对知识库检索 勾选rerank重排，保存未生效

What you expected to happen

awel 工作流编辑时，针对知识库检索 勾选rerank重排，能正常保存

How to reproduce

awel 工作流编辑时，针对知识库检索 勾选rerank重排，点击保存时前端值绑定没有生效

修改建议

Additional context

No response

Are you willing to submit PR?

• Yes I am willing to submit a PR!