Refactor os-updates: deb822 support, codename alignment, logging, reboot task, drop major-version upgrade; add healthcheck to update playbook

roles/os-updates/tasks/logging_preflight.yml

@@ -0,0 +1,48 @@
+# Preflight logging: how many and which packages need to be updated.
+# Run logging steps only when os_update_logging_enabled is true.
+
+- name: Logging - Refresh apt cache for accurate preflight
+  apt:
+    update_cache: yes
+  changed_when: false
+  when: os_update_logging_enabled | bool
+
+- name: Logging - Record start epoch
+  command: date +%s
+  register: os_update_log_start_ts
+  changed_when: false
+  when: os_update_logging_enabled | bool
+
+- name: Logging - Record start ISO time
+  command: date -Iseconds
+  register: os_update_log_start_iso
+  changed_when: false
+  when: os_update_logging_enabled | bool
+
+- name: Preflight - Gather upgradable packages
+  command: apt list --upgradable
+  register: os_update_upgradable
+  changed_when: false
+  when: os_update_logging_enabled | bool
+
+- name: Preflight - Build list of upgradable package names, versions and count
+  set_fact:
+    os_update_upgradable_names: >-
+      {{
+        os_update_upgradable.stdout_lines
+        | select('search', '\[upgradable')
+        | map('regex_replace', '^([^/]+)/.*$', '\1')
+        | list
+      }}
+    os_update_upgradable_versions: >-
+      {{
+        os_update_upgradable.stdout_lines
+        | select('search', '\[upgradable')
+        | map('regex_replace', '^([^/]+)/\S+\s+(\S+)\s+\S+\s+\[upgradable from: (\S+)\]$', '\1 \3 \2')
+        | list
+      }}
+    os_update_upgradable_count: >-
+      {{
+        (os_update_upgradable.stdout_lines | select('search', '\[upgradable') | list | length) | int
+      }}
+  when: os_update_logging_enabled | bool