/etc/fstab commit vs sync script?

Trying to understand why there is a /boot/scripts/sync.sh to call sync every 5 seconds?
```
#!/bin/bash

# regular sync to prevent data loss when direct power outage
while [ 1 ]; do
sync
sleep 5
done
```
Why not set commit parameter in /etc/fstab to 5 instead? Current in v3 seems to be 120s.
`UUID=4a110fbf-cbb4-411f-98a6-77514a52001d / ext4 defaults,noatime,commit=120,errors=remount-ro 0 1`

Start with /boot/scripts/sync.sh and the /etc/fstab entry shown in the issue, then trace how the image configures filesystem syncing. Determine the intended rationale for the 5-second sync loop versus commit=120 and document the decision or identify the configuration change maintainers should make.

Written by the indexing model from the issue text.