[Bugfix] Preserve benchmark metric sample counts in results (#7624)

Signed-off-by: psv666 <2693925048@qq.com>
Co-authored-by: amy-why-3459 <wuhaiyan17@huawei.com>

vllm_omni/benchmarks/patch/patch.py

@@ -3078,6 +3078,14 @@ async def benchmark(
             "max_concurrent_requests": metrics.max_concurrent_requests,
             "rtfx": metrics.rtfx,
         }
+        for sample_count in (
+            "num_ttft_samples",
+            "num_tpot_samples",
+            "num_itl_samples",
+            "num_audio_ttfp_samples",
+            "num_audio_rtf_samples",
+        ):
+            result[sample_count] = getattr(metrics, sample_count)
     else:
         result = {
             "duration": benchmark_duration,