build: align volta and corepack yarn versions

[FreekVR]

aligns volta and corepack on yarn 4.17.1.

Moves packageManager and volta to yarn 4.17.1, matching js-pdk, delivery-options and the plugins. Keeping one yarn version across the repos avoids corepack resolving a different one per directory, which is how a stale pin elsewhere broke a plugin build.

Running the install on 4.17.1 also refreshes yarn.lock (format version 10, plus one builtin patch hash) and has yarn write its newer settings into .yarnrc.yml. No dependency versions change. Same shape as d7f96d2f in the woocommerce repo. Verified with yarn install --immutable: exit 0, clean tree.

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.33%. Comparing base (a611219) to head (603a04f).

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #522   +/-   ##
=========================================
  Coverage     94.33%   94.33%           
  Complexity     2414     2414           
=========================================
  Files           352      352           
  Lines          7726     7726           
=========================================
  Hits           7288     7288           
  Misses          438      438           

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[Copilot]

Pull request overview

This PR aligns the Yarn version used by both Volta and Corepack to 4.17.1 to keep a consistent toolchain across related repositories and avoid Corepack resolving different Yarn versions per directory.

Changes:

• Bump volta.yarn and packageManager in package.json to Yarn 4.17.1.
• Refresh yarn.lock to the Yarn lockfile format produced by Yarn 4.17.1 (metadata version bump + builtin patch hash change).
• Update .yarnrc.yml with Yarn-generated settings from the newer Yarn version.

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 2 comments.

File	Description
package.json	Pins Yarn to 4.17.1 for both Volta and Corepack to avoid cross-repo version drift.
yarn.lock	Updates lockfile metadata/patch hash to match Yarn 4.17.1 without changing dependency versions.
.yarnrc.yml	Adds Yarn-written config entries produced by the newer Yarn version.

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[myparcel-bot]

🎉 This PR is included in version 4.7.1 🎉

The release is available on GitHub release

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