[BUG] system:get-exist-home() does not return value #6582

Describe the bug
system:get-exist-home() does not always return a value

Expected behavior
function shall always return value

To Reproduce

• check out 'develop' / v7
• build exist
• go to exist-distribution/target/exist-distribution-dir
• run bin/startup.sh
• open eXide, login as admin
• run system:get-exist-home() --> returns empty-sequence.

Context (please always complete the following information)

• Build: [eXist-7/develop]
• Java: [21]
• OS: [Mac OS X 26.5.1]

Additional context

• How is eXist-db installed? [e.g. JAR installer, DMG, … ] - git
• Any custom changes in e.g. conf.xml? - no