checkpoint = 1776898055239
suspending ai-memory on node-3
  !! ssh timeout (15s): root@157.245.1.95 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=1776898055239
  !! ssh timeout (30s): root@157.245.1.95 curl -sS --cacert /etc/ai-memory-a2a/tls/ca.pem 'https://142.93.70.84:9077/api/v1/sync/since?after=1776898055239&namespace=scenario39-delta-6601cb'
  /sync/since returned 0 rows; 0/6 match our markers