rig(flow-debugger): step J evidence

FLOW_ONLY note now names step J. Live gate on the docker rig (8 nodes rebuilt
from this branch via docker/deploy.sh, FlowLogDemo seeded by
docker/seed-flow-log-demo.sh — idempotent, add then update proven):

  J   step logs live+replay -> YES
      live:   YES root=5793ddc2-5273-4e62-86c2-ccfc8de0e080 logs=3 levels=debug,info,warn scriptRun=Failed error=CALL_FAILED
      replay: YES root=5793ddc2-5273-4e62-86c2-ccfc8de0e080 logs=3 levels=debug,info,warn scriptRun=Failed

H, H2 and I stayed YES in the same run.

Browser check (Playwright, /deployment/flow-debugger?executionId=<J root>,
screenshot /tmp/flow-log-demo.png): the SCRIPT RUN node is red with subtitle
"InvalidOperationException: demo failure" and badge "! 1 ≡ 2"; the WRITE node
carries no badge; the strip reads "LOG 0 errors · 1 warnings · 2 info"; the
detail panel opens on "Log (3)" with the full System.InvalidOperationException
block and the three info/debug/warn script lines.

docker/verify-delmia-notifier.sh

@@ -5,7 +5,7 @@ set -euo pipefail
 # crash (docker kill = SIGKILL, so auto-down failover is exercised, not CoordinatedShutdown's
 # graceful handover) + rejoin. Requires: seed-delmia-sim.sh + seed-delmia-api.sh already run, and
 # DELMIA_API_KEY exported (the token printed by seed-delmia-api.sh). FLOW_ONLY=1 skips A-G (no
-# notifier build, no docker kill) and runs the Flow Debugger steps H, H2 and I alone.
+# docker kill) and runs the Flow Debugger steps H, H2, I and J alone.
 #
 # HISTORY (2026-09-02): the first run of this script found that inbound API keys were a PER-NODE
 # SQLite store, so the key minted through the active node did not exist on the standby and every
@@ -86,7 +86,7 @@ for n in a b; do
 done
 
 if [ "${FLOW_ONLY:-}" = 1 ]; then
-  echo "== FLOW_ONLY=1: skipping A-G (notifier + failover drill); running the Flow Debugger steps H, H2 and I only"
+  echo "== FLOW_ONLY=1: skipping A-G (notifier + failover drill); running the Flow Debugger steps H, H2, I and J only"
 else
 echo "== A baseline (active first)";        write_cfg "$(url_of "$ACT"),$(url_of "$STB")" "$DELMIA_API_KEY"; notify A YES
 echo "== B standby first (relay)";           write_cfg "$(url_of "$STB"),$(url_of "$ACT")" "$DELMIA_API_KEY"; notify B YES