chore: update pnpm to v12

[Copilot]

Updates pnpm from v11 (11.20.0) to v12 (12.0.0-rc.7, the latest v12 release — v12 currently ships only pre-releases on the next-12 dist-tag).

Changes

• package.json — bumped packageManager to pnpm@12.0.0-rc.7; this pin drives Corepack and pnpm/action-setup (which reads it when no explicit version is set, as in the CodSpeed workflow)
• pnpm-lock.yaml — regenerated with pnpm 12

Lockfile format note

pnpm 12 now writes pnpm-lock.yaml as a multi-document YAML stream:

---
lockfileVersion: '9.0'

importers:

  .:
    configDependencies: {}
    packageManagerDependencies:
      pnpm:
        specifier: 12.0.0-rc.7
        version: 12.0.0-rc.7
...
---
lockfileVersion: '9.0'
# project dependency graph (unchanged structure)

The first document is the new "environment lockfile" pinning the package manager itself (packageManagerDependencies); the second holds the project dependency graph. lockfileVersion stays '9.0' and dependency resolution is unchanged. Tooling that parses the lockfile must read all YAML documents rather than only the first.

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/node-modules/urllib@872

commit: 7c8628b

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.24%. Comparing base (78546b8) to head (7c8628b).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #872   +/-   ##
=======================================
  Coverage   94.24%   94.24%           
=======================================
  Files          10       10           
  Lines         747      747           
  Branches      235      235           
=======================================
  Hits          704      704           
  Misses         40       40           
  Partials        3        3           

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[Copilot]

Pull request overview

This PR updates the repository’s package manager tooling by pinning pnpm v12 via packageManager and regenerating the lockfile accordingly, aligning local development and CI installs with pnpm 12’s new lockfile behavior.

Changes:

• Bumped packageManager in package.json from pnpm@11.20.0 to pnpm@12.0.0-rc.7.
• Regenerated pnpm-lock.yaml with pnpm 12, introducing the new multi-document YAML stream format (environment lockfile + dependency graph).

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated no comments.

File	Description
pnpm-lock.yaml	Regenerated with pnpm 12; now includes a new first YAML document that pins the pnpm toolchain itself.
package.json	Updates the packageManager pin to pnpm 12 so Corepack / setup tooling selects the intended pnpm version.

Files not reviewed (1)

• pnpm-lock.yaml: Generated file

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