Bug: Key mismatch between SettingsService and NoteUtil causes note sync failure

[fachberatung-it]

Bug Report

Description

There is a key name mismatch between SettingsService::getDefaultNotesNode()
and the destructuring in NoteUtil.php, which causes note synchronization
to fail (e.g. PUT requests from Android app returning errors).

Steps to Reproduce

1. Use Nextcloud Notes Android App (tested with v33.0.1)
2. Try to save/sync a note
3. Observe errors in nextcloud.log

Expected Behavior

Notes sync without errors.

Actual Behavior

Sync fails with errors related to note ID (e.g. note 1930).

Root Cause

SettingsService.php returns the folder node with key "folder":

return [
    'path' => $defaultFolder,
    'folder' => $node,
];