Add flake.lock for ringtail NixOS config

Prevents 'Git tree is dirty' warnings during nixos-rebuild.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

nixos/ringtail/flake.lock

@@ -0,0 +1,48 @@
+{
+  "nodes": {
+    "disko": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1771355198,
+        "narHash": "sha256-89m5VKxIs8QNiIvLsxHu5NpyhDsoXTtoN801IAurnW4=",
+        "owner": "nix-community",
+        "repo": "disko",
+        "rev": "92fceb111901a6f13e81199be4fab95fce86a5c9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "disko",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1771208521,
+        "narHash": "sha256-X01Q3DgSpjeBpapoGA4rzKOn25qdKxbPnxHeMLNoHTU=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "fa56d7d6de78f5a7f997b0ea2bc6efd5868ad9e8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-25.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "disko": "disko",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}