Initial infra scaffold: watcher live on Infomaniak Public Cloud

- flake.nix exposes a devShell (openstackclient, opentofu, sops, age) plus
  nixosConfigurations.watcher (runtime) and packages.watcher-image (QCOW2
  via nixos-generators / openstack format).
- hosts/watcher/default.nix: SSH-only base, tyro user with key auth, root
  SSH disabled, trusted-users set so laptop closure pushes work.
- modules/website.nix: Caddy serves tyrolize.ch from sites/tyrolize.ch/;
  lize.ch 301-redirects; firewall opens 80/443. Let's Encrypt via HTTP-01.
- terraform/infomaniak/: OpenStack provider, security group (22/80/443),
  keypair, compute instance booted from the uploaded image. Auth via OS_*
  env vars sourced from terraform/infomaniak/.env by the devShell hook.
- scripts/build-image.sh + scripts/deploy.sh.
- dns/{tyrolize,lize}.ch.zone: full BIND zone files for the advanced view
  in Infomaniak DNS Manager; preserves kSuite mail records on lize.ch.

Watcher live at 195.15.203.200 (IPv6 2001:1600:10💯:b4e), NixOS 25.05.
HTTPS confirmed working on both domains.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

terraform/infomaniak/.terraform.lock.hcl

@@ -0,0 +1,24 @@
+# This file is maintained automatically by "tofu init".
+# Manual edits may be lost in future updates.
+
+provider "registry.opentofu.org/terraform-provider-openstack/openstack" {
+  version     = "2.1.0"
+  constraints = "~> 2.0"
+  hashes = [
+    "h1:2TcmfEzBOGQPALErrXTaL6v+k/WAL40adao4izRYmdw=",
+    "zh:113661750398bf21c8fe36aade9fb6f5eb82b5bcd3bcd30bd37ac805d83398f4",
+    "zh:1b3c26347b9cd61e413ee93c2f422cc3278a77f55fd3516eaabb3e2a85f65281",
+    "zh:1b751bbf1e4152829a643b532fd3f5967a2e89a41fac381257e0b41665be3306",
+    "zh:1b967bbfd9b344419c0e0df0c3a15fcbd731e91f19a18955a55aace8d9ec039a",
+    "zh:1bc0fc7c0a21e568db043b654501ce668ba19bf7628d37a7d2aaa512fd6e5aeb",
+    "zh:425cbf61757d4b503e7bf0f409ea59835ca3afbd2432d56ad552c2e5d234a572",
+    "zh:67d4f059cb4d73bf6c060313ec32962c4e5bd8dc7be2542a6f2098ab32575cd9",
+    "zh:7fe841ac5b68a4f52fb3cf45070828f3845de44746679d434e4349f3c23e3ef2",
+    "zh:ac1ed4c6ef0b6a3410568a05d3f9933d184497f065988503c43da0b2f0786ab2",
+    "zh:c5c0d14c86fabd9ab6a5d555e6a8d511942665fb5fa948dd452b0d1934068344",
+    "zh:c9ae5c210192275185d6823566a9421983e8e64c2665a4cae00b92dd0706bd19",
+    "zh:ee9865ccc053e7f345e532654fb628d1cf1e81cd2e929643c1691bebffcf7b98",
+    "zh:f3416d2f666095e740522c4964e436470bb9ec17bd53aaae8169ad93297d07bd",
+    "zh:fbca85457dd49e17168989d64f7cfc4a519d55ef4e00e89cea2859e87ad87f83",
+  ]
+}