feat: add unique CoreDNS views for each VPN-defined host with forwarding

hosts/architect/dns.nix

@@ -11,6 +11,18 @@ let
             let
               architectIP = config.architect.networks.${iface}.devices.architect.address;
               interfaceNet = config.architect.networks.${iface}.net;
+              deviceViews = concatMapStrings (deviceName: device:
+                let
+                  deviceIP = device.address;
+                in
+                ''
+                  view ${deviceName} {
+                    expr client_ip() == '${deviceIP}'
+
+                    forward . 8.8.8.8
+                  }
+                ''
+              ) (builtins.attrValues config.architect.networks.${iface}.devices);
             in
             ''
               ${domain} {
@@ -29,6 +41,7 @@ let
                 cache
                 log
               }
+              ${deviceViews}
             ''
           )
           conf.dnsInterfaces;