test(e2e): validate all production source map types

[chenjiahan]

Summary

Add test case to validate all production source map types.

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[netlify]

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Lighthouse	1 paths audited Performance: 53 (🔴 down 22 from production) Accessibility: 97 (no change from production) Best Practices: 100 (no change from production) SEO: 92 (no change from production) PWA: 60 (no change from production) View the detailed breakdown and full score reports

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