[Bug][FE] Current GraphQL spec publication failed with "Cannot convert object to primitive value"

[Maryna-Ko]

To Reproduce

1. Create package
2. Publish GQL spec schema.zip

ER: spec was published
AR: publication failed with "Cannot convert object to primitive value"

Version

Frontend v. 3.5.2-dev.20260429182833
API Processor v. 5.2.2-dev.20260428143412

Logs

no info in logs

Additional information