Prevent concurrent execution of api call in the same process in vercel

[conico974]

This PR will help reduce the number of API call in Vercel by preventing concurrent execution of API call in the same instance.
This new function should not be used with use cache or cacheTag

[linear]

RND-7275 Deduplicate same instance request on vercel api call

[changeset-bot]

⚠️ No Changeset found

Latest commit: f5cec41

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[github-actions]

Summary of the deployments:

Version 1

Version	URL	Status
Latest commit	https://dc90e81a.gitbook-open.pages.dev	✅
PR	https://pr3308.gitbook-open.pages.dev	✅

Version 2

Version	URL	Status
Vercel	https://gitbook-v2-p63zv430b-gitbook.vercel.app	✅
Cloudflare	https://c6fca198-gitbook-open-v2-preview.gitbook.workers.dev	✅

Test content

Site	v1	2v	2c
GitBook	https://dc90e81a.gitbook-open.pages.dev/gitbook.com/docs	https://gitbook-v2-p63zv430b-gitbook.vercel.app/url/gitbook.com/docs	https://c6fca198-gitbook-open-v2-preview.gitbook.workers.dev/url/gitbook.com/docs
E2E	https://dc90e81a.gitbook-open.pages.dev/gitbook.gitbook.io/test-gitbook-open	https://gitbook-v2-p63zv430b-gitbook.vercel.app/url/gitbook.gitbook.io/test-gitbook-open	https://c6fca198-gitbook-open-v2-preview.gitbook.workers.dev/url/gitbook.gitbook.io/test-gitbook-open

[argos-ci]

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Build	Status	Details	Updated (UTC)
customers-v1 (Inspect)	✅ No changes detected	-	Jun 12, 2025, 10:53 AM
customers-v2 (Inspect)	⚠️ Changes detected (Review)	77 changed	Jun 12, 2025, 10:57 AM
default (Inspect)	✅ No changes detected	-	Jun 12, 2025, 10:57 AM
v2-cloudflare (Inspect)	✅ No changes detected	-	Jun 12, 2025, 10:57 AM
v2-vercel (Inspect)	✅ No changes detected	-	Jun 12, 2025, 10:58 AM