Environment

• typescript@5.9.2
• pkg-types@2.3.0

Reproduction

https://www.typescriptlang.org/play/?#code/C4TwDgpgBAysBOBLMBRAdgVwLYGcA8AKlBAB7ARoAmOUAShAMYD28leOCiaA5gDRQBDNCAB8IqAF4oAbwBQUBVADaAaShcoAawggmAMygEAugC5Dqo8TIVqUAEZMmAGwhD5igPzmVR9wrMEFlbkVDQcSDx+UF6BPlEBQaQhtkx2AFaMwFExFvHelkk2NACC8PACIHhCotn5ebEF1qFQGFQQelwQlLWtlO2d3YpQZtUA3LIAvuOyFNhQAFoy7nqOvO52AvBQk7KyoJBQABqSS0MCHmYOzq5oUXYXCzt74NAAmidwSKiYuHiHIkA

Describe the bug

When used on records with optional types (e.g. CompilerOptions), the StripEnums type utility drops those types and reverts to an any. This leads to compilerOptions being typed as below

(property) TSConfig.compilerOptions?: {
    [x: string]: any;
    allowImportingTsExtensions?: any;
    allowJs?: any;
    allowArbitraryExtensions?: any;
    allowSyntheticDefaultImports?: any;
    ... 104 more ...;
    useDefineForClassFields?: any;
} | undefined

Additional context

No response

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