test(bench): sequential matrix runner (6 corpus + 3 live runs)

scripts/bench/run-matrix.ps1

@@ -0,0 +1,22 @@
+# Runs the full pre-registered contender matrix sequentially (one process per
+# contender — clean CPU accounting, no runtime co-tenancy), then the live-window
+# latency runs on the realistic live rungs.
+$ErrorActionPreference = "Continue"
+$repo = Split-Path -Parent (Split-Path -Parent $PSScriptRoot)
+Set-Location $repo
+$exe = "C:\wt\release\examples\asr_bench.exe"
+$live = "bench-corpus\test_wavs\live-concat.wav"
+
+$contenders = @(
+    "w1-cpu-base", "w2-vulkan-base", "w3-vulkan-medium",
+    "w4-npu-onnx", "p1-parakeet-t8", "p1-parakeet-t4"
+)
+foreach ($c in $contenders) {
+    Write-Output "===== corpus: $c ====="
+    & $exe $c --corpus bench-corpus --out bench-results\raw.csv 2>&1
+}
+foreach ($c in @("w2-vulkan-base", "w4-npu-onnx", "p1-parakeet-t8")) {
+    Write-Output "===== live: $c ====="
+    & $exe $c --live $live 2>&1
+}
+Write-Output "===== matrix done ====="