Fix Jest errors after MSW upgrade to 2.11.6

[Copilot]

MSW 2.11.6 introduced a new dependency until-async that uses ES modules, causing Jest to fail parsing with SyntaxError: Unexpected token 'export'.

Changes

• Added until-async to the transformPackages list in test/jest-config.ts to ensure Jest transforms this ES module dependency to CommonJS

This fixes the test failure in variant-analysis/gh-api/gh-api-client.test.ts and restores the test suite to passing state.

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[Copilot]

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[Copilot]

Pull Request Overview

This PR adds the "until-async" package to the list of packages that should be transformed during Jest testing. This is necessary to ensure proper handling of ES modules during test execution.

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