refactor(discovery): use ping for discovery and fill MAC via SSH

auto-check/scripts/memory.sh

@@ -0,0 +1,14 @@
+echo "===TEST:memory==="
+VM_WORKERS=${AUTOCHECK_THREADS:-4}
+if [ "$VM_WORKERS" -gt 4 ]; then VM_WORKERS=4; fi
+START_TIME=$(date +%s%N)
+set +e
+OUTPUT=$(stress-ng --vm "${VM_WORKERS}" --vm-bytes 256M --vm-method all --timeout "${AUTOCHECK_DURATION:-30}s" --metrics-brief 2>&1)
+EXIT_CODE=$?
+set -e
+END_TIME=$(date +%s%N)
+DURATION_MS=$(( (END_TIME - START_TIME) / 1000000 ))
+if [ "$EXIT_CODE" -eq 0 ]; then echo 'status:pass'; else echo 'status:fail'; fi
+echo "duration:${DURATION_MS}ms"
+echo "output:${OUTPUT}"
+echo ''