Add self-contained automated server upgrade package

usr-local-sbin/app-backup.sh

@@ -8,11 +8,13 @@ LIB_DIR="$SCRIPT_DIR/../lib/app-backup"
 source "$LIB_DIR/common.sh"
 CONFIG_FILE=/etc/app-backup/app-backup.conf
 CHECK=false
+SKIP_RETENTION=false
 while (( $# )); do
   case $1 in
     --config) CONFIG_FILE=${2:?Missing config path}; shift 2 ;;
     --check) CHECK=true; shift ;;
-    --help) echo 'Usage: app-backup.sh [--config FILE] [--check]'; exit 0 ;;
+    --no-retention) SKIP_RETENTION=true; shift ;;
+    --help) echo 'Usage: app-backup.sh [--config FILE] [--check] [--no-retention]'; exit 0 ;;
     *) die "Unknown argument: $1" ;;
   esac
 done
@@ -99,6 +101,11 @@ if [[ $ENABLE_UPLOAD == true ]]; then
   echo '-- Remote backup fully read back and verified'
 fi
 
+if [[ $SKIP_RETENTION == true ]]; then
+  echo "SUCCESS: $RUN_ID (retention skipped for acceptance run)"
+  exit 0
+fi
+
 # Retention works on complete v2 sets only, after a new successful backup.
 # Older flat archives, partial runs and unknown folders are deliberately preserved.
 valid="$STAGING_DIR/local-retention.txt"