fix(lint): convert sshd restart to handler, add pipefail to btrfs subvol set

roles/environment/handlers/main.yml

@@ -0,0 +1,5 @@
+---
+- name: Restart sshd
+  ansible.builtin.service:
+    name: sshd
+    state: restarted

roles/environment/tasks/_detect_live.yml

@@ -77,13 +77,10 @@
       MaxStartups 50:30:100
       ClientAliveInterval 30
       ClientAliveCountMax 10
-  register: _sshd_config_result
+  notify: Restart sshd
 
-- name: Restart sshd immediately if config was changed
-  when: _sshd_config_result is changed
-  ansible.builtin.service:
-    name: sshd
-    state: restarted
+- name: Apply pending sshd restart before continuing
+  ansible.builtin.meta: flush_handlers
 
 - name: Abort if the host is not booted from the Arch install media
   when:

roles/partitioning/tasks/btrfs.yml

@@ -59,9 +59,12 @@
         label: "{{ item.subvol }}"
 
     - name: Set default btrfs subvolume to @
-      ansible.builtin.shell: >-
+      ansible.builtin.shell:
+        cmd: >-
+          set -o pipefail &&
           btrfs subvolume list /mnt | awk '/ path @$/ {print $2}'
           | xargs -I{} btrfs subvolume set-default {} /mnt
+        executable: /bin/bash
       register: partitioning_btrfs_default_result
       changed_when: partitioning_btrfs_default_result.rc == 0