chore: bump pnpm to 12.4.1

[btravers]

Bumps packageManager from pnpm 11.7.0 to 12.4.1 (major).

• Lockfile regenerated with pnpm install --lockfile-only: the only change is pnpm 12's new packageManagerDependencies document pinning pnpm's own integrity. Dependency graph unchanged.
• pnpm 12 breaking changes to watch in CI: unrecognized pnpm-workspace.yaml settings now error, --frozen-lockfile false removed (use --no-frozen-lockfile), stricter engineStrict.

https://claude.ai/code/session_01JqjTCSDPsbgreJKHcRABi9

Summary by CodeRabbit

• Documentation

  • Updated the documented prerequisite to require pnpm 12.4.1.

• Chores

  • Updated the project’s package manager requirement to pnpm 12.4.1.

[coderabbitai]

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Reviewing files that changed from the base of the PR and between 21cec37 and be78c0f.

📒 Files selected for processing (1)

• CONTRIBUTING.md

📝 Walkthrough

Walkthrough

The project now requires pnpm 12.4.1. Contributor documentation matches the packageManager requirement.

Changes

pnpm Version Update

Layer / File(s)	Summary
Update pnpm version contract package.json, CONTRIBUTING.md	package.json now requires pnpm 12.4.1. The prerequisites documentation shows the same version. The corepack enable guidance is unchanged.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~3 minutes

Change: Other

Merge Risk: 🔵 Low · up to 21cec

Obsolete setup guidance may mislead contributors troubleshooting Node and pnpm compatibility, but the issue is localized and does not block the upgrade itself.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: updating pnpm to version 12.4.1.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/pnpm-12.4.1

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[Copilot]

🟡 Changes recommended

pnpm-lock.yaml appears to contain two YAML documents (duplicated --- / top-level keys), which is likely to break pnpm lockfile parsing and CI.

Get a fresh assessment by requesting another Copilot review.

Pull request overview

This PR bumps the repository’s pinned package manager from pnpm 11.7.0 to pnpm 12.4.1 (via packageManager) and updates contributor docs accordingly, with an accompanying lockfile update.

Changes:

• Update packageManager in package.json to pnpm@12.4.1.
• Update CONTRIBUTING.md prerequisites to match the new pnpm version.
• Regenerate pnpm-lock.yaml to include pnpm 12’s packageManagerDependencies metadata (however, the current lockfile structure appears malformed and needs correction).

File summaries

File	Description
pnpm-lock.yaml	Lockfile update intended to reflect pnpm 12 metadata, but currently appears split into two YAML documents.
package.json	Pins the repo to pnpm 12.4.1 via packageManager.
CONTRIBUTING.md	Updates documented pnpm prerequisite version to 12.4.1.

Review details

Files not reviewed (1)

• pnpm-lock.yaml: Generated file

• Files reviewed: 2/3 changed files
• Comments generated: 1
• Review effort level: Lite

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Actionable comments posted: 1

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Inline comments:
In `@CONTRIBUTING.md`:
- Line 12: Update the pnpm compatibility note in CONTRIBUTING.md to match the
documented pnpm 12.4.1 toolchain: remove the pnpm 11/node:sqlite warning and
outdated Node 20 installation-failure rationale, or replace them with accurate
guidance for pnpm 12.4.1.

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Run ID: 63bd1778-ee17-42b6-8601-e1bc0ccc3ed0

📥 Commits

Reviewing files that changed from the base of the PR and between aed7b64 and 21cec37.

⛔ Files ignored due to path filters (1)

• pnpm-lock.yaml is excluded by !**/pnpm-lock.yaml, !pnpm-lock.yaml

📒 Files selected for processing (2)

• CONTRIBUTING.md
• package.json

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