feat: ingest burst hardening — defer lifecycle/auth, workers, nginx (v0.5.5)

Defer notify_lifecycle and notify_auth_login after commit; SAC_UVICORN_WORKERS via sac-api-start.sh; nginx /api/v1/events timeout; mass-update confirm in Hosts UI.

deploy/sac-deploy.sh

@@ -93,6 +93,10 @@ if [ -f "${APP_ROOT}/deploy/systemd/${SERVICE_NAME}.service" ]; then
   systemctl daemon-reload
  fi
 fi
+START_SH="${APP_ROOT}/deploy/systemd/sac-api-start.sh"
+if [ -f "${START_SH}" ]; then
+ chmod 755 "${START_SH}"
+fi
 
 log "Проверка DATABASE_URL (как у uvicorn через SAC_CONFIG_FILE)"
 sudo -u "${APP_USER}" bash -c "