v9.39.0

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Important Changes

• feat(browser): Add afterStartPageloadSpan hook to improve spanId assignment on web vital spans (#​16893)

This PR adds a new afterStartPageloadSpan lifecycle hook to more robustly assign the correct pageload span ID to web vital spans, replacing the previous unreliable "wait for a tick" approach with a direct callback that fires when the pageload span becomes available.

• feat(nextjs): Client-side parameterized routes (#​16934)

This PR implements client-side parameterized routes for Next.js by leveraging an injected manifest within the existing app-router instrumentation to automatically parameterize all client-side transactions (e.g. users/123 and users/456 now become become users/:id).

• feat(node): Drop 401-404 and 3xx status code spans by default (#​16972)

This PR changes the default behavior in the Node SDK to drop HTTP spans with 401-404 and 3xx status codes by default to reduce noise in tracing data.

Other Changes

• feat(core): Prepend vercel ai attributes with vercel.ai.X (#​16908)
• feat(nextjs): Add disableSentryWebpackConfig flag (#​17013)
• feat(nextjs): Build app manifest (#​16851)
• feat(nextjs): Inject manifest into client for turbopack builds (#​16902)
• feat(nextjs): Inject manifest into client for webpack builds (#​16857)
• feat(node-native): Add option to disable event loop blocked detection (#​16919)
• feat(react-router): Ensure http.server route handling is consistent (#​16986)
• fix(core): Avoid prolonging idle span when starting standalone span (#​16928)
• fix(core): Remove side-effect from tracing/errors.ts (#​16888)
• fix(core): Wrap beforeSendLog in consoleSandbox (#​16968)
• fix(node-core): Apply correct SDK metadata (#​17014)
• fix(react-router): Ensure that all browser spans have source=route (#​16984)

Work in this release was contributed by @​janpapenbrock. Thank you for your contribution!

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