Added sys.files support to the if-else condition, fixed the issue whe…

[svcvit]

Description

Bug fix: Addressed the issue with DIFY when orchestrating workflows involving visual VL models and standard text models. fixes https://github.com/langgenius/dify/issues/8824

Type of Change

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update, included: Dify Document
• [ ] Improvement, including but not limited to code refactoring, performance optimization, and UI/UX improvement
• [ ] Dependency upgrade

Testing Instructions

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

[crazywoola]

We will have a major release regarding this section. So please wait until our next release.

[crazywoola]

@laipz8200 https://github.com/langgenius/dify/pull/8838 Here is another one.