C1: ringtail — weekly flake.lock update (#352)

## Summary
- Recurring weekly lockfile refresh for `nixos/ringtail/flake.lock`.
- Inputs updated: `disko`, `home-manager`, `nixpkgs`.
- `nixpkgs-services` was deliberately skipped (per overlay convention — pinned services bump only on intentional update).
- Generated via `dagger call flake-update --src=. --flake-path=nixos/ringtail`.

## Test plan
- [x] `prek` hooks pass
- [ ] After merge: `mise run provision-ringtail` to deploy
- [ ] Then check for kernel update per [[manage-lockfile]]

## Notes
- Not deployed from this PR — provisioning is a follow-up.

Reviewed-on: #352

docs/changelog.d/review-ringtail-flake-2026-05-11.infra.md

@@ -0,0 +1 @@
+Updated `nixos/ringtail/flake.lock` (weekly cadence): `disko`, `home-manager`, and `nixpkgs` inputs refreshed. `nixpkgs-services` skipped per overlay convention.

nixos/ringtail/flake.lock

@@ -7,11 +7,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1776613567,
+        "lastModified": 1777713215,
-        "narHash": "sha256-gC9Cp5ibBmGD5awCA9z7xy6MW6iJufhazTYJOiGlCUI=",
+        "narHash": "sha256-8GzXDOXckDWwST8TY5DbwYFjdvQLlP7K9CLSVx6iTTo=",
         "owner": "nix-community",
         "repo": "disko",
-        "rev": "32f4236bfc141ae930b5ba2fb604f561fed5219d",
+        "rev": "63b4e7e6cf75307c1d26ac3762b886b5b0247267",
         "type": "github"
       },
       "original": {
@@ -27,11 +27,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1775425411,
+        "lastModified": 1778401693,
-        "narHash": "sha256-KY6HsebJHEe5nHOWP7ur09mb0drGxYSzE3rQxy62rJo=",
+        "narHash": "sha256-OVHdCqXXUF5UdGkH+FF2ZL06OLZjj2kvP2dIUmzVWoo=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "0d02ec1d0a05f88ef9e74b516842900c41f0f2fe",
+        "rev": "389b83002efc26f1145e89a6a8e6edc5a6435948",
         "type": "github"
       },
       "original": {
@@ -43,11 +43,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1777428379,
+        "lastModified": 1778430510,
-        "narHash": "sha256-ypxFOeDz+CqADEQNL72haqGjvZQdBR5Vc7pyx2JDttI=",
+        "narHash": "sha256-Ti+ZBvW6yrWWAg2szExVTwCd4qOJ3KlVr1tFHfyfi8Q=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "755f5aa91337890c432639c60b6064bb7fe67769",
+        "rev": "8fd9daa3db09ced9700431c5b7ad0e8ba199b575",
         "type": "github"
       },
       "original": {