Fix: TypeError in matchConnection for enterprise connections with no domains

[ankita10119]

Changes

Added List() as a default fallback to x.get('domains')

return x.get('domains', List()).contains(target);

This returns an empty Immutable List when domains is absent, making .contains() return false safely instead of throwing.

References

Closes #2733

Testing

Running the test suite after the fix revealed that cheerio v1.2.0 (a transitive dependency via enzyme) had broken all Jest tests due to an ESM/CommonJS incompatibility. These changes were required to restore the test suite and are not related to the bug fix itself:

• moduleNameMapper in Jest config - redirects cheerio imports to the CJS build (jsdom's browser export condition was resolving cheerio to its ESM build, which Jest cannot parse), maps the removed cheerio/lib/utils path to its new location, and stubs undici (pulled in by cheerio's CJS build for HTTP fetch, unavailable in jsdom)
• src/__tests__/__mocks__/undici.js - minimal stub for undici
• testPathIgnorePatterns - excludes __mocks__/ from Jest test discovery

Checklist

• I have read the Auth0 general contribution guidelines
• I have read the Auth0 Code of Conduct
• All code quality tools/guidelines have been run/followed
• All relevant assets have been compiled