Reminder to fix meerkat unwrap mask mirror flip

[mattieudv]

It is not a big difference, but note that the mirror operation as implemented here does not preserve the origin at the origin (one pixel offset):
https://github.com/ska-sa/dvs/blob/605356ca0e22836c14666a2845dfdb81e01e7474/dvs/hologreport.py#L179C54-L179C62
The updated katholog/dvsholog has this fixed within.