feat(backend): Add OauthAccessToken idToken member

[jfoshee]

Core-2 PR for #7583

Description

Adds an optional idToken member to the OauthAccessToken object returned by getUserOauthAccessToken. This idToken represents the ID token retrieved from OIDC providers, and is only present for OIDC-compliant OAuth 2.0 providers when available.

This change involves:

• Adding id_token?: string to the OauthAccessTokenJSON interface in JSON.ts.
• Adding idToken?: string to the OauthAccessToken class constructor and updating the fromJSON method in OauthAccessToken.ts.
• Adding JSDoc comments for the new idToken property.

API Changes

• https://github.com/clerk/clerk_go/pull/15739
• https://github.com/clerk/clerk_go/pull/15842

Checklist

• pnpm test runs as expected.
• pnpm build runs as expected.
• (If applicable) JSDoc comments have been added or updated for any package exports
• (If applicable) Documentation has been updated

Type of change

• 🐛 Bug fix
• 🌟 New feature
• 🔨 Breaking change
• 📖 Refactoring / dependency upgrade / documentation
• other:

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Summary by CodeRabbit

• New Features
  • OAuth access tokens now optionally include ID tokens from OpenID Connect-compliant providers. When available from your OAuth provider, the ID token delivers additional user identity information for enhanced security and user verification. This is only included when your provider supports OpenID Connect and returns an ID token in the response.

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[changeset-bot]

🦋 Changeset detected

Latest commit: 9c680c6

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 11 packages

Name	Type
@clerk/backend	Patch
@clerk/agent-toolkit	Patch
@clerk/astro	Patch
@clerk/express	Patch
@clerk/fastify	Patch
@clerk/nextjs	Patch
@clerk/nuxt	Patch
@clerk/react-router	Patch
@clerk/remix	Patch
@clerk/tanstack-react-start	Patch
@clerk/testing	Patch

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Project	Deployment	Review	Updated (UTC)
clerk-js-sandbox	Ready	Preview, Comment	Jan 14, 2026 6:13pm

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commit: 9c680c6