Enable live app updater on production variants

All variants now follow the same update procedure as the dev flakes;
prod variants pull the RadiantWave binary, Attic repo, and manifest
from the radiantwave channel instead of radiantwave-dev.

configuration.nix

@@ -2,8 +2,8 @@
 
 let
   radiantApp = radiantwave.packages.${pkgs.system}.default;
-  # When the live-updater module is enabled (currently dev variants only),
-  # RadiantWave launches through the mutable /var/lib/radiantwave/current
+  # When the live-updater module is enabled, RadiantWave launches through the
+  # mutable /var/lib/radiantwave/current
   # pointer so it can be swapped without a full nixos-rebuild. Otherwise it
   # launches straight from the immutable system closure as before.
   launchBin =
@@ -263,32 +263,4 @@ in
       echo "Backup completed at $(date)" > "$BACKUP_DIR/.backup-timestamp"
     '';
   };
-
-  # --- Health check service: runs after nixos-upgrade ---
-  # systemd.services.radiantwave-healthcheck = {
-  #   description = "Verify RadiantWave is running after upgrade, rollback if not";
-  #   after = [ "nixos-upgrade.service" ];
-  #   wantedBy = [ "nixos-upgrade.service" ];
-  #   serviceConfig = {
-  #     Type = "oneshot";
-  #     # Give cage time to start radiantwave after the switch
-  #     ExecStartPre = "${pkgs.coreutils}/bin/sleep 90";
-  #   };
-  #   script = ''
-  #     # The installed `radiantwave` is a makeWrapper script that execs the real
-  #     # binary (`.radiantwave-unwrapped`), so the process comm is not exactly
-  #     # `radiantwave`; match the exec'd binary's command line instead.
-  #     if ${pkgs.procps}/bin/pgrep -f '\.radiantwave-unwrapped' > /dev/null; then
-  #       echo "RadiantWave is running, upgrade successful"
-  #       exit 0
-  #     fi
-
-  #     echo "RadiantWave not found after upgrade, rolling back..."
-
-  #     # Roll back to previous NixOS generation
-  #     /run/current-system/sw/bin/nixos-rebuild switch --rollback
-
-  #     echo "Rollback completed at $(date)"
-  #   '';
-  # };
 }