fix(validation): allow circular references

[jefflembeck]

If your request body type has circular references, this causes a maximum call stack exceeded error. This change will fix that.

closes #1802

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Test plan

Tests cover the base case and also insure validation still works, even in those nested cases.

[jefflembeck]

I have no idea why that test would fail here. It passes locally (node 18, 20, and 22 on macos)

[WoH]

Can you rebase? CI should be green again

[jefflembeck]

@WoH done! Thanks!