[Bug]: NaN appears in the data returned after the operator is run, causing the agent page to not display properly.

[cike8899]

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RAGFlow workspace code commit ID

2d4a60c

RAGFlow image version

v-.17.2

Other environment information

Actual behavior

NaN appears in the data returned after the operator is run, causing the agent page to not display properly.

Because NaN is not in json format, the page cannot be displayed

Expected behavior

Remove NaN from the data returned by the interface.

Steps to reproduce

Import the following data and run the agent to see the problem.

Additional information

Import the following data and run the agent to see the problem.

[sumu-kkk]

another Nan issue (#6247 )