drift fix: validatord in start_go_stack + parity refresh

Two anchor-vs-reality drifts found during /read-mem audit:

1. start_go_stack.sh never started validatord :3221, even though
   it shipped 2026-05-02 (f9e7241) and STATE_OF_PLAY claims it as
   part of the persistent stack. Cold-boot quietly omitted it,
   leaving /v1/iterate unreachable on the persistent gateway.
   Fix: factored chatd's conditional-start block into a start_shared
   helper, called for both chatd :3220 and validatord :3221. Same
   shared-with-smokes posture as chatd (no S3 / JSONL-only state,
   no temp-toml override needed).

2. STATE_OF_PLAY header claimed 3 parity probes / 32 assertions.
   Reality is 6 probes / 38 assertions since subject_audit landed
   in 262a77a (2026-05-03). Header refreshed; cross-references
   the three runtime-divergence classes documented at
   lakehouse/STATE_OF_PLAY.md lines 36-39.

Parity reports regenerated as verification artifact (all 6 still
green: 8+12+2+4+1+6). Same pattern as c0a55b1.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

scripts/cutover/start_go_stack.sh

@@ -135,32 +135,47 @@ start observerd 4219
 start matrixd   4218
 start gateway   4110
 
-# chatd is started independently — its provider key files come from
-# /etc/lakehouse/{ollama_cloud,openrouter,opencode,kimi}.env; if
-# chatd is already up (long-running from a prior session) we don't
-# touch it. chatd uses no S3, so no temp-toml override needed.
-if ! curl -sSf -m 1 http://127.0.0.1:3220/health >/dev/null 2>&1; then
-  echo "[gostack] chatd :3220 not up; starting"
-  nohup ./bin/chatd -config lakehouse.toml > /tmp/gostack-logs/chatd.log 2>&1 & disown
+# chatd + validatord are started independently — both sit OUTSIDE
+# the persistent :4xxx range and are SHARED with smoke harnesses
+# (no bucket / port conflict because chatd has no S3 state and
+# validatord's state is JSONL files, not MinIO). Provider key files
+# come from /etc/lakehouse/{ollama_cloud,openrouter,opencode,kimi}.env.
+# If either is already up (long-running from a prior session) we
+# don't touch it. The matching smokes (chatd_smoke / validatord_smoke)
+# do `pkill -f "bin/<name>$"` on teardown — re-running this script
+# brings them back. No temp-toml override needed for either.
+start_shared() {
+  local bin="$1"
+  local port="$2"
+  if curl -sSf -m 1 "http://127.0.0.1:$port/health" >/dev/null 2>&1; then
+    echo "  $bin :$port already up (skipping)"
+    return 0
+  fi
+  echo "[gostack] $bin :$port not up; starting"
+  nohup ./bin/"$bin" -config lakehouse.toml > "/tmp/gostack-logs/$bin.log" 2>&1 & disown
   for _ in $(seq 1 50); do
-    if curl -sSf -m 1 "http://127.0.0.1:3220/health" >/dev/null 2>&1; then
-      echo "  chatd :3220 up"
-      break
+    if curl -sSf -m 1 "http://127.0.0.1:$port/health" >/dev/null 2>&1; then
+      echo "  $bin :$port up"
+      return 0
     fi
     sleep 0.1
   done
-else
-  echo "  chatd :3220 already up (skipping)"
-fi
+  echo "  $bin :$port FAILED — log tail:"
+  tail -20 "/tmp/gostack-logs/$bin.log"
+  return 1
+}
+
+start_shared chatd      3220
+start_shared validatord 3221
 
 echo
 echo "[gostack] ready · sweep:"
-for p in 4110 4211 4212 4213 4214 4215 4216 4217 4218 4219 3220; do
+for p in 4110 4211 4212 4213 4214 4215 4216 4217 4218 4219 3220 3221; do
   curl -sSf -m 1 "http://127.0.0.1:$p/health" 2>/dev/null | head -c 80
   echo
 done
 echo
 echo "[gostack] persistent stack: ports :4110+:4211-:4219 · bucket=$PERSISTENT_BUCKET"
 echo "[gostack] smoke harnesses:  ports :3110+:3211-:3219 · bucket=lakehouse-go-primary"
-echo "[gostack] shared:           chatd at :3220 (read-mostly LLM dispatch)"
+echo "[gostack] shared:           chatd :3220 + validatord :3221 (no S3 / JSONL-only state)"
 echo "[gostack] tear down via: pkill -f 'bin/persistent-'"