feat: v1 release branch — generated flakes and template track ?ref=v1

Installed machines and the downstream template now resolve nomarchy from
git+https://git.bemagri.xyz/bernardo/nomarchy.git?ref=v1 (the lock's
original node carries the ref too), so `nix flake update` follows the
release branch instead of the forge's default branch. README quickstart
points at the real forge.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

README.md

@@ -111,7 +111,7 @@ Nomarchy is consumed as a flake input — you never fork or edit this repo:
 
 ```sh
 mkdir my-machine && cd my-machine
-nix flake init -t github:YOUR-USER/nomarchy
+nix flake init -t "git+https://git.bemagri.xyz/bernardo/nomarchy.git?ref=v1"
 ```
 
 You own two files day-to-day: `system.nix` and `home.nix` (plus

flake.nix

@@ -45,11 +45,13 @@
           (nixpkgs.lib.concatStringsSep "\n"
             (builtins.attrNames nixos-hardware.nixosModules));
         nixpkgsPath = nixpkgs.outPath;
-        flakeUrl = "git+${gitUrl}";
+        # v1 is the release branch: installed machines track it on
+        # `nix flake update` instead of the forge's default branch.
+        flakeUrl = "git+${gitUrl}?ref=v1";
         # Future updates re-resolve from the forge (original); the install
         # itself resolves from the ISO store (locked = path) — fully
         # offline, even from a dirty-tree ISO.
-        originalNode = { type = "git"; url = gitUrl; };
+        originalNode = { type = "git"; url = gitUrl; ref = "v1"; };
         lockedNode = {
           type = "path";
           path = self.outPath;

templates/downstream/flake.nix

@@ -4,8 +4,8 @@
   # The only input. nixpkgs, home-manager etc. come pinned through it —
   # tested together upstream. This file is written once (by you or the
   # installer) and never hand-edited afterwards; your machine lives in
-  # system.nix and home.nix.
-  inputs.nomarchy.url = "github:YOUR-USER/nomarchy"; # <- the distro repo
+  # system.nix and home.nix. v1 is the release branch.
+  inputs.nomarchy.url = "git+https://git.bemagri.xyz/bernardo/nomarchy.git?ref=v1";
 
   outputs = { nomarchy, ... }:
     nomarchy.lib.mkFlake {