Fix successful Hermes stable updates without commit changes

libexec/hermes-stack-hermes-update

@@ -15,6 +15,8 @@ log() {
 
 notify_user() {
   local text="$1"
+  # Keep the outcome in this service's journal as well as the notifier's journal.
+  printf '%s\n' "$text"
   if [[ -x "$NOTIFIER" ]]; then
     "$NOTIFIER" "$text" || true
   else
@@ -226,7 +228,12 @@ mapfile -t old_backups < <(
 ((${#old_backups[@]} == 0)) || rm -f -- "${old_backups[@]}"
 
 new_commit="$(git -C "$HERMES_REPO" rev-parse HEAD)"
-if [[ "$new_commit" == "$old_commit" ]]; then
+# The updater selects the configured channel (e.g. stable), whereas the fetch
+# above only checks remote connectivity. Stable may legitimately stay on the
+# same commit even when origin/main has advanced.
+if [[ "$new_commit" == "$old_commit" ]] && ((update_exit == 0)); then
+  notify_user "Hermes ist im konfigurierten Update-Kanal bereits aktuell: $new_commit. Konfiguration und frisch gestarteter Gateway sind gesund."
+elif [[ "$new_commit" == "$old_commit" ]]; then
   notify_user "Hermes-Update wurde nicht installiert (Updater-Exitcode $update_exit); der bisherige Commit $new_commit und der frisch gestartete Gateway sind gesund."
   exit 1
 elif ((update_exit != 0)); then