chore: npm -> pnpm

[nirinchev]

Proposed changes

Switch from npm to pnpm to better align with other projects within MongoDB.

Install dependencies stats:

platform	npm	pnpm	change
macOS	26s	17s	-35%
ubuntu	32s	9s	-72%
windows	3m 19s	29s	-85%

[Copilot]

Pull request overview

This PR migrates the project's package manager from npm to pnpm, updating all scripts, documentation, workflows, and configurations to use pnpm instead of npm.

Key Changes:

• Switched from npm to pnpm commands throughout the codebase
• Added packageManager field and pnpm.overrides section to package.json
• Updated GitHub Actions workflows to use pnpm with proper caching
• Updated dependency installation commands to use pnpm install --frozen-lockfile

Reviewed changes

Copilot reviewed 13 out of 15 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
package.json	Added packageManager field, pnpm overrides section, and updated all npm script references to pnpm
scripts/accuracy/runAccuracyTests.sh	Replaced npx commands with pnpm dlx and updated comment referencing npm
README.md	Added pnpm as a development prerequisite
CONTRIBUTING.md	Updated all documentation references from npm to pnpm
Dockerfile	Modified to install pnpm before installing the package globally
.github/workflows/*.yml	Updated all workflow files to use pnpm/action-setup, pnpm cache, and pnpm commands

[coveralls]

Pull Request Test Coverage Report for Build 19674859703

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.3%) to 80.253%

---

Totals
Change from base Build 19664220542:	0.3%
Covered Lines:	6394
Relevant Lines:	7872

---

💛 - Coveralls

[github-actions]

📊 Accuracy Test Results

📈 Summary

Metric	Value
Commit SHA	ca40817c26e8f4e26a6389d8d8cbcca325b508b7
Run ID	21c497d1-f9dc-4728-a5fd-e7d44fe12df1
Status	done
Total Prompts Evaluated	104
Models Tested	1
Average Accuracy	89.9%
Responses with 0% Accuracy	10
Responses with 75% Accuracy	3
Responses with 100% Accuracy	93

📊 Baseline Comparison

Metric	Value
Baseline Commit	e4d3d7bc646ddb636e84f60297593301af7ac789
Baseline Run ID	5988100c-df68-4981-8f59-4b8da497dd7f
Baseline Run Status	done
Responses Improved	3
Responses Regressed	3

---

📎 Download Full HTML Report - Look for the accuracy-test-summary artifact for detailed results.

Report generated on: 11/24/2025, 7:07:35 PM