[Release] Increase version to 3.4.2

[hectorhdzg]

Maintenance release for the 3.4.x line:

• Prototype pollution hardening in extend()/objExtend() (fix: prevent prototype pollution in extend() and objExtend() via __proto__ key filtering #2735)
• OsPlugin emits correct CS 4.0 fields ext.os.name / ext.os.ver (fix(OsPlugin): use correct CS 4.0 field names ext.os.name and ext.os.ver #2732)
• RequestEnvelopeCreator uses correct request envelope name (fix: RequestEnvelopeCreator sends "RequestData" as envelope name instead of "Microsoft.ApplicationInsights.{ikey}.Request" #2724)
• Offline channel null-provider fix (fix(offline-channel): Add missing return after reject() to prevent null provider dereference #2734)
• Dependency vulnerability resolution and npm->pnpm migration (fix: Migrate from npm to pnpm and resolve all dependency vulnerabilities #2733)
• CI: drop Node 16, add Node 22 and 24 (Drop Node.js 16 from CI matrix; add Node.js 22 and 24 #2731)

[Copilot]

Pull request overview

Bumps the Application Insights JavaScript SDK monorepo to the 3.4.2 maintenance release line (and aligned related package versions), updating release documentation and version-pinned tests/config to match the new published artifacts.

Changes:

• Update version.json, root/package package.json files, and internal dependency pins to 3.4.2 (plus related package bumps like @microsoft/1ds-post-js 4.4.2, offline channel 0.4.2, etc.).
• Add the 3.4.2 entry to RELEASES.md and update version-bearing build/test references (size checks, perf baseline, cache version constant).
• Update CDN version table and tooling metadata to include the new release version.

Reviewed changes

Copilot reviewed 38 out of 38 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
version.json	Sets release baseline to 3.4.2 and bumps per-package release versions.
package.json	Bumps root package version to 3.4.2.
gruntfile.js	Updates perf baseline version list to 3.4.2.
RELEASES.md	Adds 3.4.2 release notes/changelog section and comments out unreleased placeholder header.
shared/AppInsightsCore/src/utils/DataCacheHelper.ts	Updates embedded core version string to 3.4.2.
shared/AppInsightsCore/package.json	Bumps core package version to 3.4.2.
shared/AppInsightsCommon/package.json	Bumps common package and core dependency pin to 3.4.2.
shared/1ds-core-js/package.json	Bumps 1ds-core-js to 4.4.2 and updates core dependency pin.
channels/1ds-post-js/package.json	Bumps 1ds-post-js to 4.4.2 and updates core dependency pin.
channels/offline-channel-js/package.json	Bumps offline channel to 0.4.2 and updates core dependency pin.
channels/applicationinsights-channel-js/package.json	Bumps channel package to 3.4.2 and updates core dependency pin.
channels/tee-channel-js/package.json	Bumps tee channel to 3.4.2 and updates core dependency pin.
AISKU/package.json	Bumps AISKU package + internal dependency pins (incl. offline channel) to the new versions.
AISKU/README.md	Adds 3.4.2 CDN size badge row (and updates table contents).
AISKU/Tests/Unit/src/AISKUSize.Tests.ts	Updates version-pinned size test to 3.4.2.
AISKU/Tests/Unit/src/CdnPackaging.tests.ts	Updates version-pinned CDN packaging test to 3.4.2.
AISKU/Tests/Perf/src/AISKUPerf.ts	Updates perf test default version to 3.4.2.
AISKU/Tests/es6-module-type-check/package.json	Updates version and dependency pins to 3.4.2.
AISKULight/package.json	Bumps AISKULight package + internal dependency pins to 3.4.2.
AISKULight/Tests/Unit/src/AISKULightSize.Tests.ts	Updates version-pinned size test to 3.4.2.
extensions/applicationinsights-analytics-js/package.json	Bumps analytics package and internal pins to 3.4.2.
extensions/applicationinsights-clickanalytics-js/package.json	Bumps click analytics package and internal pins to 3.4.2.
extensions/applicationinsights-cfgsync-js/package.json	Bumps cfgsync package and internal pins to 3.4.2.
extensions/applicationinsights-debugplugin-js/package.json	Bumps debug plugin package and internal pins to 3.4.2.
extensions/applicationinsights-dependencies-js/package.json	Bumps dependencies plugin package and internal pins to 3.4.2.
extensions/applicationinsights-osplugin-js/package.json	Bumps osplugin package and internal pins to 3.4.2.
extensions/applicationinsights-perfmarkmeasure-js/package.json	Bumps perfmarkmeasure package and internal pins to 3.4.2.
extensions/applicationinsights-properties-js/package.json	Bumps properties plugin package and internal pins to 3.4.2.
extensions/applicationinsights-properties-js/Tests/Unit/src/propertiesSize.tests.ts	Updates version-pinned size test to 3.4.2.
tools/applicationinsights-web-snippet/package.json	Bumps snippet tool package and devDependency pins to 3.4.2.
tools/chrome-debug-extension/package.json	Bumps chrome debug extension version and core dependency pin.
tools/chrome-debug-extension/manifest.json	Bumps extension manifest version/version_name to 0.9.2.
tools/config/package.json	Bumps config tool package version to 1.1.2.
examples/AISKU/package.json	Bumps example package and dependency pins to 3.4.2.
examples/dependency/package.json	Bumps example package and dependency pins to 3.4.2.
examples/shared-worker/package.json	Bumps example package and dependency pins to 3.4.2.
examples/startSpan/package.json	Bumps example package and dependency pins to 3.4.2.
examples/cfgSync/package.json	Bumps example package and dependency pins to 3.4.2.