docs: add HA Matrix integration notes and record .local rewrite removals

hosts/dns.windy.lan.md

@@ -48,9 +48,11 @@ space before increasing retention.  DNSSEC is disabled because the selected
 upstream path did not pass the known-bad-signature validation check; do not
 enable it without re-testing validated upstreams.
 
-The compatible names `hass.windy.lan` and legacy `hass.local` currently point
-to the same Home Assistant address.  Migrate clients to `hass.windy.lan`; keep
-the legacy rewrite until its planned retirement.
+`hass.windy.lan` points to Home Assistant via this rewrite.  The legacy
+`hass.local` rewrite was removed on 2026-08-14; `hass.local` now resolves only
+via HAOS mDNS/LLMNR (`hostname: hass`), not via AdGuard Home.  The
+`nas.windy.local` rewrite was likewise removed on 2026-08-14; `.local` names
+are now left to mDNS only.  Remaining rewrites all use `.windy.lan`.
 
 ## Mihomo and routing boundary