DNS queries were going through Traefik's IngressRouteUDP, replacing
real client IPs with Traefik pod IPs (10.10.169.150) in Technitium logs.
Changed Technitium DNS service from NodePort to LoadBalancer with
externalTrafficPolicy: Local, removed dns-udp entrypoint and
IngressRouteUDP from Traefik, and updated CoreDNS to forward .lan
queries to Technitium's LoadBalancer IP directly.
Add kubernetes_config_map for CoreDNS to the technitium module, with a
template block for cluster.local.viktorbarzin.lan that returns NXDOMAIN
immediately. This prevents ndots:5 search domain expansion from flooding
Technitium with ~66k/day junk queries (e.g.
redis.redis.svc.cluster.local.viktorbarzin.lan).
Also enabled saveCache on Technitium so the DNS cache persists across
pod restarts.
