Bump next-auth session cookie to v2

[Codebmk]

Summary of Changes (What does this PR do?)

• Rename NextAuth session cookie to include a -v2 suffix in both the NextAuth options and middleware (src/vertex/app/api/auth/[...nextauth]/options.ts and src/vertex/middleware.ts). This rotates the cookie name for production and development to avoid collisions and enable migration to the new cookie version.

Status of maturity (all need to be checked before merging):

• I've tested this locally
• I consider this code done
• This change ready to hit production in its current state
• The title of the PR states what changed and the related issues number (used for the release note).
• I've included issue number in the "Closes #ISSUE-NUMBER" part of the "What are the relevant tickets?" section to link the issue.
• I've updated corresponding documentation for the changes in this PR.
• I have written unit and/or e2e tests for my change(s).

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What are the relevant tickets?

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Screenshots (optional)

Summary by CodeRabbit

• Chores
  • Updated authentication session configuration with improved cookie handling to enhance security and reliability across production and non-production environments.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 8d8903cf-734e-4d44-b319-99420fd94987

📥 Commits

Reviewing files that changed from the base of the PR and between 0ba6034 and 1248354.

📒 Files selected for processing (2)

• src/vertex/app/api/auth/[...nextauth]/options.ts
• src/vertex/middleware.ts

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📝 Walkthrough

Walkthrough

This PR upgrades the NextAuth session cookie name to a v2 variant across authentication configuration and middleware. The cookie name changes from __Secure-next-auth.session-token / next-auth.session-token to their -v2 equivalents in production and non-production respectively, ensuring consistent cookie handling throughout the application.

Changes

Session Cookie v2 Upgrade

Layer / File(s)	Summary
Session token cookie name upgrade to v2 src/vertex/app/api/auth/[...nextauth]/options.ts, src/vertex/middleware.ts	Auth options and middleware update the session token cookie name to use the -v2 variant in both production (__Secure-next-auth.session-token-v2) and non-production (next-auth.session-token-v2) environments.

Estimated Code Review Effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Poem

🍪 A cookie grows from v1 to v2,
Secure and sweet in all we do,
Auth and middleware dance as one,
Session tokens—version two is spun! ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The PR title accurately describes the main change: updating the NextAuth session cookie name to a v2 variant across both configuration and middleware files.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

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🧪 Generate unit tests (beta)

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• Commit unit tests in branch ft-vertex-template

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Errors (1)

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