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.

stacks/homepage/conf/services.yaml

@@ -27,6 +27,13 @@
       icon: mdi-filmstrip
       siteMonitor: http://10.100.10.50:8090/healthz
       description: Media drop + upload-for-pickup + the standing agent link board — nh3-dev, 24h TTL except kept boards
+  # Manual entry — WhereTF is a user-level systemd service on nh3-dev (Bun,
+  # like the Booth), so Homepage can't auto-discover it.
+  - WhereTF:
+      href: http://10.100.10.50:8093/
+      icon: mdi-magnify-scan
+      siteMonitor: http://10.100.10.50:8093/healthz
+      description: Photograph drawers; ask where the f X is, or where a new thing should go — nh3-dev, LAN only
   - The Henge:
       href: http://park.phasefinal.com:8420/
       icon: mdi-clipboard-check