feat(apple): Prewarmed app starts in V9

[philipphofmann]

DESCRIBE YOUR PR

With v9, enablePreWarmedAppStartTracing is enabled by default.

We must wait until releasing Cocoa SDK v9 to merge this PR.

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Help us prioritize incoming PRs by letting us know when the change needs to go live.

• Urgent deadline (GA date, etc.):
• Other deadline:
• None: Not urgent, can wait up to 1 week+

SLA

• Teamwork makes the dream work, so please add a reviewer to your PRs.
• Please give the docs team up to 1 week to review your PR unless you've added an urgent due date to it.
  Thanks in advance for your help!

PRE-MERGE CHECKLIST

Make sure you've checked the following before merging your changes:

• Checked Vercel preview for correctness, including links
• PR was reviewed and approved by any necessary SMEs (subject matter experts)
• PR was reviewed and approved by a member of the Sentry docs team

[vercel]

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Project	Deployment	Preview	Comments	Updated (UTC)
sentry-docs	Ready	Preview	Comment	Oct 23, 2025 7:55am

1 Skipped Deployment

Project	Deployment	Preview	Comments	Updated (UTC)
develop-docs	Ignored			Oct 23, 2025 7:55am

[codecov]

Bundle Report

Changes will decrease total bundle size by 15 bytes (-0.0%) ⬇️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
sentry-docs-client-array-push	10.16MB	-6 bytes (-0.0%) ⬇️
sentry-docs-server-cjs	12.98MB	-9 bytes (-0.0%) ⬇️

Affected Assets, Files, and Routes:

view changes for bundle: sentry-docs-server-cjs

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
1729.js	-3 bytes	1.78MB	-0.0%
../instrumentation.js	-3 bytes	1.1MB	-0.0%
9523.js	-3 bytes	1.08MB	-0.0%

view changes for bundle: sentry-docs-client-array-push

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
static/chunks/pages/_app-*.js	-3 bytes	882.71kB	-0.0%
static/chunks/8321-*.js	-3 bytes	425.87kB	-0.0%
static/I4RzMO5qYAzFwAtH0i5r_/_buildManifest.js (New)	684 bytes	684 bytes	100.0% 🚀
static/I4RzMO5qYAzFwAtH0i5r_/_ssgManifest.js (New)	77 bytes	77 bytes	100.0% 🚀
static/fKpOZ_AIANLN7O7XyuIp4/_buildManifest.js (Deleted)	-684 bytes	0 bytes	-100.0% 🗑️
static/fKpOZ_AIANLN7O7XyuIp4/_ssgManifest.js (Deleted)	-77 bytes	0 bytes	-100.0% 🗑️

[coolguyzone]

There is a 404 link here, once we address that this will be good to go.