style: repo-wide lint pass — make the lint gate green again

Push builds have been RED on the lint step since ~build 209 from accumulated
formatting drift. This is the mechanical cleanup: ruff format + ruff --fix
(UP038 isinstance unions, SIM105 contextlib.suppress, UP031 f-strings, SIM115
tempfile context manager), shfmt -i 2 -ci, nixpkgs-fmt/statix/deadnix (merged
attrsets, dropped unused lib args), yamllint, and shell quoting fixes in
tests/lasuite-docs/setup_custom_tests.sh. No behaviour changes intended;
lint: PASS, unit tests: 138 passed.

nix/hosts/cc-ci-hetzner/configuration.nix

@@ -7,7 +7,7 @@
 #   git clone --recursive https://git.autonomic.zone/recipe-maintainers/cc-ci.git /etc/cc-ci
 #   install -m600 <age-private-key> /var/lib/sops-nix/key.txt
 #   nixos-rebuild switch --flake /etc/cc-ci#cc-ci-hetzner
-{ pkgs, lib, ... }:
+{ pkgs, ... }:
 {
   imports = [
     ./hardware.nix

nix/hosts/cc-ci-hetzner/hardware.nix

@@ -11,13 +11,17 @@
 {
   imports = [ (modulesPath + "/profiles/qemu-guest.nix") ];
 
-  boot.loader = {
-    efi.efiSysMountPoint = "/boot/efi";
-    grub = {
-      efiSupport = true;
-      efiInstallAsRemovable = true;
-      device = "nodev";
+  boot = {
+    loader = {
+      efi.efiSysMountPoint = "/boot/efi";
+      grub = {
+        efiSupport = true;
+        efiInstallAsRemovable = true;
+        device = "nodev";
+      };
     };
+    initrd.availableKernelModules = [ "ata_piix" "uhci_hcd" "xen_blkfront" "vmw_pvscsi" ];
+    initrd.kernelModules = [ "nvme" ];
   };
 
   fileSystems."/boot/efi" = {
@@ -25,9 +29,6 @@
     fsType = "vfat";
   };
 
-  boot.initrd.availableKernelModules = [ "ata_piix" "uhci_hcd" "xen_blkfront" "vmw_pvscsi" ];
-  boot.initrd.kernelModules = [ "nvme" ];
-
   fileSystems."/" = {
     device = "/dev/sda1";
     fsType = "ext4";

nix/modules/nightly-sweep.nix

@@ -29,7 +29,7 @@ in
     serviceConfig = {
       Type = "oneshot";
       # A full sweep across several recipes (each a cold deploy/test/teardown) is long; bound it.
-      TimeoutStartSec = "21600";  # 6h ceiling
+      TimeoutStartSec = "21600"; # 6h ceiling
       ExecStart = "${sweep}/bin/cc-ci-nightly-sweep";
     };
   };
@@ -39,7 +39,7 @@ in
     wantedBy = [ "timers.target" ];
     timerConfig = {
       OnCalendar = "*-*-* 03:00:00";
-      Persistent = true;   # catch up a missed nightly after downtime
+      Persistent = true; # catch up a missed nightly after downtime
       RandomizedDelaySec = "600";
     };
   };