Docs: Update benchmark for test 3

tests/3_signal_pipeline/outputs/google_gemini-3-pro-preview TEMP_0.35.js

@@ -0,0 +1,50 @@
+const analyzeSignal = async (yamlInput) => {
+  const cdn = 'https://esm.sh/',
+    [Yaml, MathPkg, ndarray, fft, DOMPurify] = await Promise.all(
+      ['js-yaml', 'mathjs', 'ndarray', 'ndarray-fft', 'dompurify'].map(lib => 
+        import(`${cdn}${lib}`).then(m => m.default || m)
+      )
+    );
+
+  const { sampleRate: sr, duration: dur, components: comps } = Yaml.load(yamlInput),
+    N = sr * dur,
+    realData = new Float64Array(N),
+    imagData = new Float64Array(N);
+
+  for (let i = 0; i < N; i++) {
+    const t = i / sr;
+    realData[i] = comps.reduce((acc, { frequency: f, amplitude: a }) => 
+      acc + a * MathPkg.sin(2 * MathPkg.pi * f * t), 0);
+  }
+
+  const r = ndarray(realData, [N]),
+    i = ndarray(imagData, [N]);
+
+  fft(1, r, i);
+
+  const peaks = [];
+  for (let k = 0; k <= N / 2; k++) {
+    const mag = MathPkg.sqrt(r.get(k) ** 2 + i.get(k) ** 2) / (N / 2);
+    if (mag > 0.1) {
+      peaks.push({
+        frequencyHz: Math.round(k * sr / N),
+        magnitude: +mag.toFixed(2)
+      });
+    }
+  }
+
+  peaks.sort((a, b) => b.magnitude - a.magnitude);
+
+  const rows = peaks.map(p => `<tr><td>${p.frequencyHz}</td><td>${p.magnitude}</td></tr>`).join(''),
+    rawHtml = `<table><tr><th>Frequency (Hz)</th><th>Magnitude</th></tr>${rows}</table>`,
+    purifier = DOMPurify(self);
+
+  return {
+    peaks,
+    html: purifier.sanitize(rawHtml),
+    signalLength: N
+  };
+};
+export default analyzeSignal;
+// Generation time: 50.247s
+// Result: PASS