refactor(flake): inline assembly wiring

flake.nix

@@ -76,13 +76,9 @@
     { self, nixpkgs, ... }@inputs:
     let
       inherit (nixpkgs) lib;
-      flake = import ./flake { inherit lib inputs self; };
     in
     {
-      # Every host under hosts/ is discovered and built.
-      nixosConfigurations = flake.mkHosts {
-        root = self + "/hosts";
-      };
+      inherit (import ./flake { inherit lib inputs self; }) nixosConfigurations;
 
       # A project shell for agent-local resources that should travel with this
       # checkout rather than the operator's global profile.