pinwheel: Add secrets for mullvad

hosts/pinwheel/modules/mullvad/default.nix

@@ -4,4 +4,16 @@
     enable = true;
     package = pkgs.mullvad-vpn;
   };
+
+  age.secrets = {
+    "mullvad-device" = {
+      file = ../../../../secrets/pinwheel/mullvad-device.age;
+      path = "/etc/mullvad-vpn/device.json";
+    };
+
+    "mullvad-account-history" = {
+      file = ../../../../secrets/pinwheel/mullvad-account-history.age;
+      path = "/etc/mullvad-vpn/account-history.json";
+    };
+  };
 }