feat: lifecycle notification_body and aligned host label 1.2.13-SAC

Co-authored-by: Cursor <cursoragent@cursor.com>

sac-client.sh

@@ -228,7 +228,7 @@ sac_send_event() {
   SAC_DETAILS_JSON="$details_json" \
   SAC_AGENT_ID="$(sac_agent_instance_id)" \
   SAC_PRODUCT_VERSION="${SSH_MONITOR_VERSION:-unknown}" \
-  SAC_SERVER_DISPLAY_NAME="${SERVER_DISPLAY_NAME:-}" \
+  SAC_SERVER_DISPLAY_NAME="$(server_display_name_with_ip)" \
   SAC_HOST_IPV4="${SERVER_IPV4:-}" \
   python3 <<'PY'
 import json, os, socket, uuid