checkpoint = 2026-04-24T17:17:58+00:00
suspending ai-memory on node-3
  !! ssh timeout (30s): -c 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: True (after 1 probes)
node-3 asks node-1 /api/v1/sync/since?since=2026-04-24T17:17:58+00:00
  curl exit=0 http_code=200 body_len=2898 stderr=''
  /sync/since raw=6 ns-filtered=6; 6/6 match our markers
  diag: updated_since=2026-04-24T17:17:58+00:00 earliest=2026-04-24T17:18:31.134307069+00:00 latest=2026-04-24T17:18:32.045443208+00:00