feat: add disko input for nixos-anywhere provisioning

flake.nix

@@ -10,6 +10,12 @@
     colmena.url = "github:zhaofengli/colmena";
     colmena.inputs.nixpkgs.follows = "nixpkgs";
 
+    # ── Disk partitioning (nixos-anywhere) ───────────────────
+    disko = {
+      url = "github:nix-community/disko";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
     # ── User environment management ──────────────────────────
     home-manager = {
       url = "github:nix-community/home-manager";
@@ -27,6 +33,7 @@
     { nixpkgs
     , nixpkgs-stable
     , colmena
+    , disko
     , home-manager
     , treefmt-nix
     , ...
@@ -77,7 +84,10 @@
     {
       # ── Local build / nixos-rebuild compat ──────────────────
       nixosConfigurations = {
-        blade = mkHost "blade" [ ./hosts/blade ];
+        blade = mkHost "blade" [
+          disko.nixosModules.disko
+          ./hosts/blade
+        ];
       };
 
       # ── Colmena remote deployment ───────────────────────────
@@ -99,7 +109,10 @@
             keys.phoenix.keyFile = "/home/nixos/.ssh/id_ed25519.pub";
             tags = [ "homelab" ];
           };
-          imports = baseModules ++ [ ./hosts/blade ];
+          imports = baseModules ++ [
+            disko.nixosModules.disko
+            ./hosts/blade
+          ];
         };
       };