After the interface baseline is reset, a port that is already down reads as
"first seen down", which neither alerts nor resolves. An alert opened before
the reset was then stuck open without updates: micro1's enp3s0 had sat at
one failed check since March with no ticket. An interface with an open
interface_down alert is now treated as previously up, so the alert keeps
counting, tickets and resolves as normal.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>