limited users do not get full view

I was wondering if there is anything I can do for limited users that cannot see the full configuration. Using lfs 1.3.0

As limited user:
```
┌──┬─────┬──────────────┬────┬────┬─────┬─────────┬─────┬─────┬───────────────────────┐
│id│ dev │ filesystem │disk│type│used │ use% │ free│size │mount point │
├──┼─────┼──────────────┼────┼────┼─────┼─────────┼─────┼─────┼───────────────────────┤
│38│259:4│/dev/nvme0n1p1│SSD │xfs │7.5Gi│54% ██▊ │6.5Gi│14Gi │/ │
│43│259:4│/dev/nvme0n1p1│SSD │xfs │7.5Gi│54% ██▊ │6.5Gi│14Gi │/var/tmp │
│44│259:1│/dev/nvme2n1 │SSD │xfs │1.8Gi│36% █▊ │3.2Gi│5.0Gi│/var/lib/docker │
│49│259:0│/dev/nvme1n1 │SSD │xfs │ │ │ │ │/var/lib/docker/volumes│
└──┴─────┴──────────────┴────┴────┴─────┴─────────┴─────┴─────┴───────────────────────┘
```
As root:
```
┌──┬─────┬──────────────┬────┬────┬─────┬─────────┬─────┬──────┬───────────────────────┐
│id│ dev │ filesystem │disk│type│used │ use% │ free│ size │mount point │
├──┼─────┼──────────────┼────┼────┼─────┼─────────┼─────┼──────┼───────────────────────┤
│38│259:4│/dev/nvme0n1p1│SSD │xfs │7.5Gi│54% ██▊ │6.5Gi│14Gi │/ │
│43│259:4│/dev/nvme0n1p1│SSD │xfs │7.5Gi│54% ██▊ │6.5Gi│14Gi │/var/tmp │
│49│259:0│/dev/nvme1n1 │SSD │xfs │218Mi│ 2% ▏ │9.8Gi│10.0Gi│/var/lib/docker/volumes│
│44│259:1│/dev/nvme2n1 │SSD │xfs │1.8Gi│36% █▊ │3.2Gi│5.0Gi │/var/lib/docker │
└──┴─────┴──────────────┴────┴────┴─────┴─────────┴─────┴──────┴───────────────────────┘
```
In this example all the contents inside `/var/lib/docker/volumes` is owned by root. I'm not sure if that is the reason `lfs` can't calculate the stats.
`drwx-----x 5 root root 97 Nov 16 11:35 volumes`

Start by reproducing the issue with lfs 1.3.0 as a limited user and as root, focusing on /var/lib/docker/volumes and comparing the displayed filesystem statistics. Investigate why the limited-user view omits the usage values, then verify that the affected filesystem shows the same complete statistics when permissions allow it.

Written by the indexing model from the issue text.