feat(homepage,dns): add WhereTF card + DNS alias; fix homepage docker discovery

WhereTF (operator-directed, brokkr-smithy-dev; nh3-dev:8093, user-systemd Bun
service): manual Homepage card under Apps (can't auto-discover) + DNS alias
wherethef.nh3.internal -> nh3-dev.

While adding the card, found Homepage's /api/services was hung (dashboard
degraded since the 2026-09-06 irv-ml1 move): its docker.yaml still pointed
irv-ml1 at the dead 10.100.79.3, and ana-ml2 (10.250.50.54:2375) is unreachable
from esh-docker-vm — either dead host hangs the whole aggregation on its TCP
connect timeout. Repointed irv-ml1 to 10.6.110.50 (verified reachable via mesh)
and disabled ana-ml2 (reversible, noted). /api/services now returns in 0s with
96 services; WhereTF renders.

dns/internal.yaml

@@ -118,5 +118,6 @@ aliases:
   - {name: searxng,   site: nh3, target: nh3-docker, note: moved off ana-docker 2026-09-03 — colo egress (38.120.12.42) is CAPTCHA-gated by search engines; NH3 egresses residentially}
   - {name: gateway,   site: ana, target: ana-docker, note: LiteLLM gateway :4000}
   - {name: booth,     site: nh3, target: nh3-dev,    note: The Booth :8090}
+  - {name: wherethef, site: nh3, target: nh3-dev,    note: WhereTF :8093}
   - {name: homepage,  site: esh, target: esh-docker-vm, note: fleet dashboard :5100}
   - {name: scriberr,  site: ana, target: ana-ml2,     note: transcription + diarization :8080 (GPU1)}