feat(nuxt): Add middleware instrumentation compatibility for Nuxt 5

[s1gr1d]

Nitro v3 (used by Nuxt 5) ships with h3 v2, which restructures the EventHandlerObject type (old / new). The previous onRequest/onBeforeResponse lifecycle hooks are replaced by a single middleware array, and handler is now optional.

This PR updates the Nuxt SDK's middleware instrumentation to handle both shapes transparently: h3 v1 (onRequest, onBeforeResponse, required handler) for Nuxt 4 / Nitro v2, and h3 v2 (middleware[], optional handler) for Nuxt 5 / Nitro v3.

The Nuxt 5 test app middleware files are updated to match the new h3 v2 API, and unit/E2E test assertions are adjusted accordingly.

Closes #19954

[github-actions]

Semver Impact of This PR

🟡 Minor (new features)

📋 Changelog Preview

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New Features ✨

Deps

• Bump mongodb-memory-server-global from 10.1.4 to 11.0.1 by dependabot in #19888
• Bump stacktrace-parser from 0.1.10 to 0.1.11 by dependabot in #19887

Nuxt

• Add middleware instrumentation compatibility for Nuxt 5 by s1gr1d in #19968

• Conditionally use plugins based on Nitro version (v2/v3) by s1gr1d in #19955

Other

• (elysia) Elysia SDK by logaretm in #19509

Bug Fixes 🐛

Cloudflare

• Send correct events in local development by JPeer264 in #19900
• Forward ctx argument to Workflow.do user callback by Lms24 in #19891

Core

• Preserve .withResponse() on Anthropic instrumentation by nicohrubec in #19935
• Truncate content array format in Vercel by nicohrubec in #19911
• Send internal_error as span status for Vercel error spans by nicohrubec in #19921
• Do not overwrite user provided conversation id in Vercel by nicohrubec in #19903
• Return same value from startSpan as callback returns by s1gr1d in #19300

Deps

• Update lockfile to resolve h3@1.15.10 by chargome in #19933
• Bump fast-xml-parser to 5.5.8 in @azure/core-xml chain by chargome in #19918
• Bump next to 15.5.14 in nextjs-15 and nextjs-15-intl E2E test apps by chargome in #19917
• Bump socket.io-parser to 4.2.6 to fix CVE-2026-33151 by chargome in #19880

Other

• (craft) Add missing mainDocsUrl for @sentry/effect SDK by bc-sentry in #19860
• (nestjs) Add node to nest metadata by chargome in #19875
• (serverless) Add node to metadata by nicohrubec in #19878

Internal Changes 🔧

Deps Dev

• Bump effect from 3.19.19 to 3.20.0 by dependabot in #19926
• Bump qunit-dom from 3.2.1 to 3.5.0 by dependabot in #19546
• Bump @react-router/node from 7.13.0 to 7.13.1 by dependabot in #19544

Nuxt

• Extract core logic for storage/database to prepare for Nuxt v5 by s1gr1d in #19920
• Extract handler patching to extra plugin for Nitro v2/v3 by s1gr1d in #19915

Other

• (astro) Re-enable server island tracing e2e test in Astro 6 by Lms24 in #19872
• (ci) Fix "Gatbsy" typo in issue package label workflow by chargome in #19905
• (claude) Enable Claude Code Intelligence (LSP) by s1gr1d in #19930
• (cloudflare) Enable multi-worker tests for CF integration tests by JPeer264 in #19938
• (core) Remove duplicate buildMethodPath utility from openai by nicohrubec in #19969
• (elysia) Drop @elysiajs/opentelemetry dependency by logaretm in #19947
• (lint) Resolve oxlint warnings by isaacs in #19893
• (node-integration-tests) Remove unnecessary file-type dependency by Lms24 in #19824
• (remix) Replace glob with native recursive fs walk by roli-lpci in #19531
• (sveltekit) Replace recast + @babel/parser with acorn by roli-lpci in #19533
• Add external contributor to CHANGELOG.md by javascript-sdk-gitflow in #19925
• Add external contributor to CHANGELOG.md by javascript-sdk-gitflow in #19909

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size-limit report 📦

⚠️ Warning: Base artifact is not the latest one, because the latest workflow run is not done yet. This may lead to incorrect results. Try to re-run all tests to get up to date results.

Path	Size	% Change	Change
@sentry/browser	25.69 kB	+0.2%	+49 B 🔺
@sentry/browser - with treeshaking flags	24.17 kB	+0.14%	+33 B 🔺
@sentry/browser (incl. Tracing)	42.67 kB	+0.13%	+54 B 🔺
@sentry/browser (incl. Tracing, Profiling)	47.33 kB	+0.12%	+55 B 🔺
@sentry/browser (incl. Tracing, Replay)	81.48 kB	+0.08%	+57 B 🔺
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	71.06 kB	+0.1%	+69 B 🔺
@sentry/browser (incl. Tracing, Replay with Canvas)	86.17 kB	+0.06%	+50 B 🔺
@sentry/browser (incl. Tracing, Replay, Feedback)	98.41 kB	+0.04%	+36 B 🔺
@sentry/browser (incl. Feedback)	42.48 kB	+0.08%	+30 B 🔺
@sentry/browser (incl. sendFeedback)	30.35 kB	+0.15%	+43 B 🔺
@sentry/browser (incl. FeedbackAsync)	35.4 kB	+0.12%	+39 B 🔺
@sentry/browser (incl. Metrics)	26.96 kB	+0.15%	+38 B 🔺
@sentry/browser (incl. Logs)	27.1 kB	+0.12%	+32 B 🔺
@sentry/browser (incl. Metrics & Logs)	27.78 kB	+0.15%	+39 B 🔺
@sentry/react	27.45 kB	+0.22%	+58 B 🔺
@sentry/react (incl. Tracing)	45.01 kB	+0.14%	+60 B 🔺
@sentry/vue	30.13 kB	+0.16%	+46 B 🔺
@sentry/vue (incl. Tracing)	44.52 kB	+0.09%	+39 B 🔺
@sentry/svelte	25.7 kB	+0.16%	+40 B 🔺
CDN Bundle	28.35 kB	+0.27%	+75 B 🔺
CDN Bundle (incl. Tracing)	43.57 kB	+0.15%	+62 B 🔺
CDN Bundle (incl. Logs, Metrics)	29.22 kB	+0.27%	+77 B 🔺
CDN Bundle (incl. Tracing, Logs, Metrics)	44.43 kB	+0.17%	+75 B 🔺
CDN Bundle (incl. Replay, Logs, Metrics)	68.29 kB	+0.13%	+85 B 🔺
CDN Bundle (incl. Tracing, Replay)	80.41 kB	+0.1%	+73 B 🔺
CDN Bundle (incl. Tracing, Replay, Logs, Metrics)	81.31 kB	+0.1%	+76 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback)	85.97 kB	+0.12%	+103 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics)	86.86 kB	+0.1%	+86 B 🔺
CDN Bundle - uncompressed	82.7 kB	+0.1%	+77 B 🔺
CDN Bundle (incl. Tracing) - uncompressed	128.62 kB	+0.05%	+64 B 🔺
CDN Bundle (incl. Logs, Metrics) - uncompressed	85.57 kB	+0.1%	+77 B 🔺
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed	131.49 kB	+0.05%	+64 B 🔺
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed	209.22 kB	+0.05%	+102 B 🔺
CDN Bundle (incl. Tracing, Replay) - uncompressed	245.5 kB	+0.04%	+89 B 🔺
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed	248.35 kB	+0.04%	+89 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed	258.41 kB	+0.04%	+89 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed	261.26 kB	+0.04%	+89 B 🔺
@sentry/nextjs (client)	47.4 kB	+0.08%	+37 B 🔺
@sentry/sveltekit (client)	43.12 kB	+0.12%	+51 B 🔺
@sentry/node-core	56.42 kB	+0.14%	+74 B 🔺
@sentry/node	173.51 kB	+0.21%	+356 B 🔺
@sentry/node - without tracing	96.43 kB	+0.1%	+87 B 🔺
@sentry/aws-serverless	113.44 kB	+0.09%	+100 B 🔺

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