feat: nb performance tweaks

hosts/nb/configuration.nix

@@ -74,10 +74,11 @@ in {
   users.defaultUserShell = pkgs.zsh;
 
   services.fwupd.enable = true;
+  services.irqbalance.enable = true;
 
   swapDevices = [ {
     device = "/nix/persist/swapfile";
-    size = 32 * 1024;  # Size is in megabytes (for hibernation)
+    size = 96 * 1024;  # Size is in megabytes (96GB for full hibernation with 92GB RAM)
   } ];
 
   # Memory tuning for 92GB RAM
@@ -91,6 +92,14 @@ in {
   # nixos cross building qemu
   boot.binfmt.emulatedSystems = [ "aarch64-linux" ];
   boot.supportedFilesystems = [ "ntfs" ];
+
+  # Btrfs maintenance
+  services.btrfs.autoScrub = {
+    enable = true;
+    interval = "monthly";
+    fileSystems = [ "/nix" ];
+  };
+
   boot.plymouth = {
     enable = true;
     theme = "spin";