fix: ignore Vercel OG traces for split functions

[james-elicx]

Summary

• skip Vercel OG traces whose route is not present in the default server function
• keep OG usage detection and asset patching scoped to routes bundled into that function
• add regression coverage for mixed and split-only OG routes

Root cause

patchVercelOgLibrary scanned NFT traces from the complete Next.js build, but parsed the corresponding route under server-functions/default. Named-function routes remain in the build traces while being intentionally absent from the default package, causing ENOENT during parsing.

Testing

• pnpm --filter cloudflare exec vitest --run src/cli/build/patches/ast/patch-vercel-og-library.spec.ts
• pnpm code:checks
• pnpm test (34 test files, 343 tests)

Closes #1314

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🦋 Changeset detected

Latest commit: dbe4339

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

This PR includes changesets to release 1 package

Name	Type
@opennextjs/cloudflare	Patch

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commit: dbe4339

[james-elicx]

Feels like is probably just masking a separate issue rather than a proper fix.