test-changed: map reorganized dankclaw quadlet subtrees

The pre-commit hook runs scripts/test-changed.sh, which requires a
focused-test mapping for every staged path. The quadlets were moved into
dankclaw/<svc>/quadlet/ but the mapping still only matched top-level
dankclaw/*.container, so any nested quadlet or the pihole addn-hosts/env
data files fell through to the catch-all 'die' and blocked commit.
Add the nested-quadlet mappings (pihole-specific first, then the
dankclaw/*/quadlet/* fallback) plus the pihole data-file paths.

dankclaw/pihole/addn-hosts

@@ -1,6 +1,6 @@
 # A records for the flat franksdank.name scheme (dnsmasq addn-hosts format:
 # <IP> <name> [<name> ...]). Served by the Pi-hole quadlet (FTL is a
-# dnsmasq fork): the quadlet mounts this file into /etc/dnsmasq.d/ read-only.
+# dnsmasq fork): the quadlet mounts this file into /etc/pihole/hosts/ read-only.
 #
 # Caddy is consolidated on dankclaw (192.168.0.143): it fronts every service
 # on both hosts, so every name resolves to that one IP. Keep in sync with the