Prepare isolated Qwen3.8 IQ4_XS A/B tests

experiments/qwen38-20260907-ab/wait-ready.sh

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+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+NAME=mike-ai-llama-qwen38-ab
+deadline=$((SECONDS + ${READY_TIMEOUT:-900}))
+until curl -fsS --max-time 3 http://127.0.0.1:5005/health >/dev/null; do
+  state=$(docker inspect -f '{{.State.Running}}' "$NAME" 2>/dev/null || true)
+  if [[ $state != true ]]; then
+    docker logs --tail 100 "$NAME" >&2 || true
+    exit 1
+  fi
+  if ((SECONDS >= deadline)); then
+    docker logs --tail 100 "$NAME" >&2 || true
+    exit 1
+  fi
+  sleep 2
+done
+curl -fsS http://127.0.0.1:5005/props
+printf '\nA/B test server is ready.\n'