checkpoint = 2026-04-23T19:28:08+00:00
suspending ai-memory on node-3
  !! ssh timeout (30s): root@159.89.191.162 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 15s for process resume + federation catchup
  node-3 → node-1 health reachable: False (after 10 probes)
node-3 asks node-1 /api/v1/sync/since?since=2026-04-23T19:28:08+00:00
  curl exit=28 http_code=0 body_len=0 stderr='curl: (28) Connection timed out after 15002 milliseconds'
  /sync/since raw=0 ns-filtered=0; 0/6 match our markers
  diag: updated_since=None earliest=None latest=None