[MarioPym]

Summary

Since #49476, AUserDataOCSController::fillStorageInfo() reads the used space from the home storage root (''). On local storage, this works because HomeCache overrides the root size with the size of files/. However, HomeObjectStoreStorage does not use HomeCache, meaning that when S3 is used as primary storage, the root size improperly includes files_trashbin, files_versions, and uploads.

Consequently, GET /ocs/v2.php/cloud/users/<uid> reports inflated quota usage (sometimes resulting in negative free space), whereas quota enforcement (Quota wrapper, root => 'files') correctly counts only files/. This causes mobile clients to incorrectly display accounts as full.

This PR changes the controller to read the cache entry of the user folder (files) directly. For local home storage, the resulting value remains identical.

Note: DAV quota-used-bytes (via OC_Helper::getStorageInfo()) shares this issue on object stores because it also queries the cache for ''. Making HomeObjectStoreStorage utilize HomeCache like Home would resolve both issues. I have kept this PR scoped strictly to the provisioning API, but I am happy to open a separate PR for the storage layer if that is the preferred direction.

How to test

1. Use S3 as primary object storage, create a user with a 10 MB quota.
2. Upload a 3 MB file twice (one version), upload and delete a 2 MB file (trash bin), and leave a 2 MB chunked upload unfinished.
3. GET /ocs/v2.php/cloud/users/<uid>:
   • Before: used 10485924, free -164, relative 100
   • After: used 3145892, free 7339868, relative 30

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)
• Labels added where applicable (ex: bug/enhancement, 3. to review, feature component)
• Milestone added for target branch/version (ex: 32.x for stable32)

AI (if applicable)

• The content of this PR was partly or fully generated using AI