Docs: Update benchmark for test 3

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

@@ -0,0 +1,54 @@
+async function analyzeSignal(yamlStr) {
+  const [
+    { load: parseYaml },
+    math,
+    ndarray,
+    fft,
+    { default: purify }
+  ] = await Promise.all([
+    import('https://cdn.skypack.dev/js-yaml'),
+    import('https://cdn.skypack.dev/mathjs'),
+    import('https://cdn.skypack.dev/ndarray'),
+    import('https://cdn.skypack.dev/ndarray-fft'),
+    import('https://cdn.skypack.dev/dompurify')
+  ]);
+
+  const { sampleRate: fs, duration, components } = parseYaml(yamlStr);
+  const N = fs * duration;
+  const signal = new Float64Array(N);
+
+  for (let i = 0; i < N; i++) {
+    const t = i / fs;
+    signal[i] = components.reduce((acc, { frequency: f, amplitude: a }) => 
+      acc + a * math.sin(2 * math.pi * f * t), 0);
+  }
+
+  const real = ndarray(new Float64Array(signal), [N]);
+  const imag = ndarray(new Float64Array(N), [N]);
+  fft(1, real, imag);
+
+  const peaks = [];
+  for (let k = 0; k <= N / 2; k++) {
+    const mag = math.sqrt(real.get(k) ** 2 + imag.get(k) ** 2) / (N / 2);
+    if (mag > 0.1) {
+      peaks.push({
+        frequencyHz: Math.round(k * fs / 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('');
+  const rawHtml = `<table><tr><th>Frequency (Hz)</th><th>Magnitude</th></tr>${rows}</table>`;
+
+  return {
+    peaks,
+    html: purify.sanitize(rawHtml),
+    signalLength: N
+  };
+}
+export default analyzeSignal;
+// Generation time: 4.379s
+// Result: FAIL