checkpoint = 1776829020939
suspending ai-memory on node-3
  !! ssh timeout (15s): root@143.198.12.140 pgrep -f 'ai-memory serve' | xargs -r kill -STOP
alice + bob write 6 rows while node-3 is out
resuming ai-memory on node-3
settle 4s for process resume
node-3 asks node-1 /api/v1/sync/since?after=1776829020939
  !! ssh timeout (30s): root@143.198.12.140 curl -sS 'http://138.197.33.142:9077/api/v1/sync/since?after=1776829020939&namespace=scenario39-delta-402179'
  /sync/since returned 0 rows; 0/6 match our markers