[Bug]: @opExample generation fails in @versioned namespaces with union + enum

[Grryum]

Describe the bug

When a namespace is annotated with @versioned, example generation (@opExample) breaks if the operation’s return type includes a union that references an enum.

The same code works correctly if @versioned is removed.

Reproduction

1. Create a @versioned namespace.
2. Define an enum and a discriminated union using that enum.
3. Add @opExample annotations to an operation returning that union.
4. Compile or generate OpenAPI — the example generation fails or produces invalid output.

Minimal example here

Checklist

• Follow our Code of Conduct
• Check that there isn't already an issue that request the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion.
• The provided reproduction is a minimal reproducible example of the bug.

[Grryum]

I tried to investigate problem for my self and localized problem with in the resolveUnions function where versioning constraints were causing false negatives in type assignability checks.
Maybe it can help.