Add support for OpenAPI v3.2.0

[janisto]

Prerequisites

• I have written a descriptive issue title
• I have searched existing issues to ensure the feature has not already been requested

🚀 Feature Proposal

OpenAPI Specification v3.2.0:
https://spec.openapis.org/oas/v3.2.0.html

Announcement:
https://www.openapis.org/blog/2025/09/23/announcing-openapi-v3-2

Motivation

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Example

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