[mabaasit]

Description

Open Questions

Checklist

• I have signed the Contributor License Agreement (https://www.mongodb.com/legal/contributor-agreement)
• New tests and/or benchmarks are included
• Documentation is changed or added

[codeowners-service-app]

Assigned ivandevp for team compass-developers because nbbeeken is out of office.
Assigned himanshusinghs for team mongosh-developers because nbbeeken is out of office.

[Copilot]

🟢 Approval recommended

The worker response and client handling are consistent, and the regression assertions cover the intended metadata preservation.

No open issues 🎉

What changed in this PR

This PR preserves parser error metadata across the web worker boundary, allowing callers to receive location details alongside the original error type.

Changes:

• Send error properties separately in failed worker responses and restore them on the client.
• Extend the regression test to check error position and location metadata.

File	Description
packages/​shell-bson-parser/​src/​worker.ts	Include enumerable error properties in failed responses.
packages/​shell-bson-parser/​src/​worker-types.ts	Add error properties to the failure response type.
packages/​shell-bson-parser/​src/​worker-client.ts	Restore error properties before rejecting the request.
packages/​shell-bson-parser/​src/​index.spec.ts	Verify preservation of error type and location metadata.

_{Review effort: Balanced}