Docs: Update benchmark for test 4

tests/4_hexchain_pipeline/outputs/google_gemini-3.1-pro-preview.js

@@ -0,0 +1,44 @@
+export async function hexchain(t) {
+  const [
+    { parse },
+    { default: SR },
+    { mean, standardDeviation, median },
+    { default: Ajv },
+    { default: TT },
+    { default: DP }
+  ] = await Promise.all([
+    'smol-toml', 'seedrandom', 'simple-statistics', 'ajv', 'text-table', 'dompurify'
+  ].map(m => import(`https://esm.sh/${m}`)));
+
+  const c = parse(t), a = new Ajv();
+  
+  if (!a.validate({
+    type: 'object',
+    required: ['seed', 'count', 'label'],
+    properties: {
+      seed: { type: 'string' },
+      count: { type: 'integer', minimum: 1, maximum: 10000 },
+      label: { type: 'string', minLength: 1 }
+    }
+  }, c)) return { valid: false, errors: a.errorsText() };
+
+  const r = new SR(c.seed), n = Array.from({ length: c.count }, () => r());
+  const f = x => Number(x(n).toFixed(6));
+  const [m, s, d] = [mean, standardDeviation, median].map(f);
+
+  return {
+    valid: true,
+    label: c.label,
+    count: c.count,
+    stats: { mean: m, stddev: s, median: d },
+    table: DP.sanitize(`<pre class="stats">${TT([
+      ['Stat', 'Value'],
+      ['mean', String(m)],
+      ['stddev', String(s)],
+      ['median', String(d)]
+    ])}</pre>`)
+  };
+}
+export default hexchain;
+// Generation time: 58.112s
+// Result: PASS