Issue:

Fixes #3978

Demo:

Changes

1. Added cross-env to scripts for consistent environment variable handling across platforms.
2. Removed the explicit MongoDB version from MongoMemoryServer.create() to avoid timeout errors and repeated binary downloads during tests.

Why

• cross-env ensures scripts run correctly on Windows, macOS, and Linux.
• Dropping the pinned MongoDB version prevents Jest hooks from stalling while fetching unsupported or slow binaries.

I have verified that this pull request:

• has no linting errors (npm run lint)
• has no test errors (npm run test)
• has no typecheck errors (npm run typecheck)
• is from a uniquely-named feature branch and is up to date with the develop branch.
• is descriptively named and links to an issue number, i.e. Fixes #123
• meets the standards outlined in the accessibility guidelines