fix custom file type err :Received err: File validation failed for file

[Tory31]

Summary

Fix #12428

Screenshots

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Checklist

Important

Please review the checklist below before submitting your pull request.

• This change requires a documentation update, included: Dify Document
• I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.
• I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods

[crazywoola]

Please resolve the lint errors by running dev/reformat.

[docimin]

Can this please be looked at..? @Tory31

[laipz8200]

Seems this PR is outdated, I will close it. If you have any questions, feel free to mention me.

[docimin]

@laipz8200 so is this fixed then?

[laipz8200]

@laipz8200 so is this fixed then?

It should be fixed in #15714