CoreDNS iamworkin.lan template + ndots:5 was hijacking
unrealircd.irc.svc.cluster.local lookups → Traefik VIP → timeout.
Every alert since ~2026-04-09 silently failed with "IRC send failed: timed out",
which also killed the thermal-printer path (routed through irc-notify).
Same fix pattern as guacamole@28b7600.