antivirus: the Sensu monitoring check now only warns about stale ClamAV data
files after 26 hours, to prevent spurious warnings from machines which have
a delayed update job for load spreading purposes (PL-132844).
flyingcircus.roles.mailserver now works in the devhost environment (PL-132682).
opensearch: single-node clusters will now enter maintenance without checking
if the cluster health is in the green state (PL-132797).
Pull upstream NixOS changes, security fixes and package updates (PL-132838):