chore: move to pnpm 12.4.2

[altaywtf]

Problem

The repo pinned an older pnpm; 12.4.2 is current.

Solution

Bump packageManager. packageManagerDependencies tracks pnpm itself, so the lockfile diff is the pinned pnpm exe entries and nothing else — no application dependency re-resolves and lockfileVersion stays 9.0.

Proof

pnpm run verify passed.

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-19T14:02:38.289306Z	75ffc22	PR opened

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[Copilot]

Copilot review overview

🟢 Approval recommended

The change is a straightforward pnpm pin update with consistent lockfile updates and no application dependency re-resolution indicated.

Review effort: Lite
Findings: None

What changed in this PR

Updates the repository’s pinned package manager to pnpm 12.4.2, aligning package.json’s packageManager field with the lockfile’s packageManagerDependencies so installs use the intended pnpm executable without re-resolving application dependencies.

Changes:

• Bump package.json packageManager from pnpm@12.0.0 to pnpm@12.4.2.
• Update pnpm-lock.yaml packageManagerDependencies and the corresponding pnpm/@pnpm/exe.* entries to 12.4.2 while keeping lockfileVersion: '9.0'.

File	Description
package.json	Pins the repo’s package manager to pnpm@12.4.2.
pnpm-lock.yaml	Updates the embedded pnpm executable package entries and snapshots to 12.4.2.

Files not reviewed (1)

• pnpm-lock.yaml: Generated file

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