feat(update): update the backend like nodes via quadlet restart [CI]

packaging/update/install-updater.sh

@@ -5,7 +5,7 @@
 set -eu
 
 COMPONENT="${1:-}"; shift || true
-case "$COMPONENT" in agent|probe|backend) ;; *) echo "usage: install-updater.sh <agent|probe|backend> [--user] [--engine podman|docker] --data-dir D --image-repo R --unit U [--policy auto|manual] [--channel dev|release] [--health-url URL] [--authfile F] [--no-enable]" >&2; exit 2 ;; esac
+case "$COMPONENT" in agent|probe) ;; *) echo "usage: install-updater.sh <agent|probe> [--user] [--engine podman|docker] --data-dir D --image-repo R --unit U [--policy auto|manual] [--channel dev|release] [--health-url URL] [--authfile F] [--no-enable]" >&2; exit 2 ;; esac
 DATA_DIR=""; IMAGE_REPO=""; UNIT=""; POLICY=manual; AUTHFILE=""; ENGINE=podman; SERVICE_SCOPE=system; ENABLE=true; DATA_VOLUME=""; STATUS_VOLUME=""; HELPER_IMAGE=""
 CHANNEL=""; HEALTH_URL=""
 while [ $# -gt 0 ]; do
@@ -31,10 +31,6 @@ if [ -z "$IMAGE_REPO" ] || [ -z "$UNIT" ] || { [ -z "$DATA_DIR" ] && [ -z "$DATA
 fi
 case "$POLICY" in auto|manual) ;; *) echo "--policy must be auto or manual" >&2; exit 2 ;; esac
 case "$ENGINE" in podman|docker) ;; *) echo "--engine must be podman or docker" >&2; exit 2 ;; esac
-if [ "$COMPONENT" = backend ]; then
-  [ "$POLICY" = manual ] && [ -n "$DATA_VOLUME" ] && [ -n "$HEALTH_URL" ] || { echo "Backend requires manual policy, a data volume and --health-url" >&2; exit 2; }
-  case "$CHANNEL" in dev|release) ;; *) echo "Backend requires --channel dev or release" >&2; exit 2 ;; esac
-fi
 if [ -n "$DATA_VOLUME" ]; then
   [ -z "$DATA_DIR" ] || { echo "use --volume or --data-dir, not both" >&2; exit 2; }
   [ -n "$HELPER_IMAGE" ] || { echo "--volume needs --helper-image (an already pulled MoShiro image)" >&2; exit 2; }