feat: add backup config for orion

hosts/orion/boot.nix

@@ -0,0 +1,48 @@
+{ pkgs, ... }:
+{
+  services.scx.enable = true;
+  services.scx.scheduler = "scx_bpfland";
+
+  networking.hostId = "a9408846";
+
+  boot = {
+    kernelPackages = pkgs.linuxPackages_cachyos-server;
+    zfs.package = pkgs.zfs_cachyos;
+    zfs.devNodes = "/dev/disk/by-id";
+
+    loader = {
+      grub = {
+        enable = true;
+        device = "nodev";
+        copyKernels = true;
+        efiSupport = true;
+        enableCryptodisk = true;
+        useOSProber = false;
+        zfsSupport = true;
+      };
+      efi.efiSysMountPoint = "/efi";
+      efi.canTouchEfiVariables = true;
+    };
+
+    kernelModules = [
+      "tcp_bbr"
+      "veth"
+      "nfsv4"
+    ];
+    kernelParams = [
+      "scsi_mod.use_blk_mq=1"
+      "pti=off"
+      "spectre_v2=off"
+    ];
+    kernel.sysctl = {
+      "kernel.split_lock_mitigate" = 0;
+      "vm.overcommit_memory" = 1;
+    };
+
+    tmp.useTmpfs = true;
+    tmp.tmpfsSize = "100%";
+    tmp.tmpfsHugeMemoryPages = "within_size";
+
+    supportedFilesystems = [ "zfs" ];
+  };
+}

hosts/orion/default.nix

@@ -11,6 +11,7 @@
 
     ./boot.nix
     ./disk-config.nix
+    ./backups.nix
   ];
 
   ataraxia.defaults.role = "server";