Cut the comment bloat from the Podman playbooks

Comment blocks now stay within three lines and explain only the non-obvious. Long histories, include examples, and commented-out code are gone. No task, key, or value changed; the only data change is comment text inside the generated unit files.

yamtrack/roles/yamtrack/handlers/main.yaml

@@ -1,16 +1,11 @@
 ---
-# All handlers run as the connection user ({{ podman_user }}), so systemctl
-# --user works without setting XDG_RUNTIME_DIR.
 
 - name: Reload systemd user units
   ansible.builtin.command: systemctl --user daemon-reload
   changed_when: true
   listen: Reload systemd user units
 
-# A changed environment file or unit file changes the generated unit, so
-# Yamtrack is recreated. The database is a bind mount and the rest of /yamtrack
-# is image content, so a recreate loses nothing — but it is a few seconds of
-# downtime for the one site.
+# A recreate keeps state in the bind mount but costs a few seconds of downtime.
 - name: Restart Yamtrack
   ansible.builtin.systemd_service:
     name: "{{ unit_name }}"