feat: add d4r inference engines and Windows parity tooling

Add native K/M/RR inference engines, HIP kernels, replay and validation
harnesses, and Windows DLSS setup and runtime support. Include GPU
profiling tools, build and packaging scripts, platform integration
patches, and implementation documentation.

scripts/windows/test-m-captures.ps1

@@ -0,0 +1,51 @@
+[CmdletBinding()]
+param([Parameter(Mandatory=$true)][string]$CaptureDirectory, [string]$HipRoot,
+    [string]$PackageRoot, [string]$OutputDirectory, [int]$Blocks = 12,
+    [Parameter(Mandatory=$true)][string]$DlssDll, [int]$PtxBlocks = 2)
+$ErrorActionPreference = 'Stop'
+. (Join-Path $PSScriptRoot 'gpu-target.ps1')
+$repo = [IO.Path]::GetFullPath((Join-Path $PSScriptRoot '../..'))
+if (!$HipRoot) { $HipRoot = Join-Path $repo '.tools/therock-10.2.0a20260929/_rocm_sdk_core' }
+if (!$PackageRoot) { $PackageRoot = Join-Path $repo 'dist/windows-rdna4-therock' }
+$GpuArch=Get-D4RGpuTarget $PackageRoot $null
+if (!$OutputDirectory) { $OutputDirectory = Join-Path $repo ('test-results/m-real-reference-' + (Get-Date -Format 'yyyyMMdd-HHmmss')) }
+New-Item -ItemType Directory -Force $OutputDirectory | Out-Null
+$previousPython=$env:PYTHONPATH; $previousDiag=$env:D4R_DIAG_DIR
+$env:PYTHONPATH = "$(Join-Path $repo '.tools/python/vendor');$previousPython"
+$summary = [ordered]@{utc=[DateTime]::UtcNow.ToString('o'); captureDirectory=$CaptureDirectory; layers=@(); passed=$false}
+try {
+    foreach ($layer in @('enc1','enc2','enc3_tube','dec2','dec1')) {
+        $name = "rrlite_${layer}_4x4"
+        $captures = @(Get-ChildItem -LiteralPath $CaptureDirectory -Directory | Where-Object Name -Match ("^replay-[0-9]+-" + $name + '$'))
+        if (!$captures.Count) { throw "Missing actual M capture: $name" }
+        $capture = $captures | Sort-Object Name | Select-Object -First 1
+        $folder = Join-Path $OutputDirectory $layer
+        $output = Join-Path $folder 'output'
+        New-Item -ItemType Directory -Force $folder | Out-Null
+        $env:D4R_DIAG_DIR = $folder
+        & (Join-Path $PackageRoot 'bin/d4r_native_replay_probe.exe') --hip-root $HipRoot `
+            --module (Join-Path $PackageRoot "experimental/m/${name}_${GpuArch}.hsaco") `
+            --fixture-dir $capture.FullName --output-dir $output --iterations 1 `
+            > (Join-Path $folder 'gpu.stdout.log') 2> (Join-Path $folder 'gpu.stderr.log')
+        if ($LASTEXITCODE) { throw "M $layer actual GPU replay failed: $folder" }
+        & python (Join-Path $PackageRoot 'm_replay_validate.py') validate --layer $layer `
+            --fixture-dir $capture.FullName --output-dir $output --blocks $Blocks --real-capture `
+            > (Join-Path $folder 'reference.stdout.log') 2> (Join-Path $folder 'reference.stderr.log')
+        if ($LASTEXITCODE) { throw "M $layer mismatch; stopping before the next layer: $folder" }
+        Get-Content -LiteralPath (Join-Path $folder 'reference.stdout.log') | Write-Host
+        & python -u (Join-Path $PackageRoot 'm_ptx_validate.py') --layer $layer `
+            --capture-dir $capture.FullName --native-dir $output --dlss-dll $DlssDll `
+            --output-dir (Join-Path $folder 'private-ptx') --blocks $PtxBlocks `
+            > (Join-Path $folder 'ptx-reference.stdout.log') 2> (Join-Path $folder 'ptx-reference.stderr.log')
+        if ($LASTEXITCODE) { throw "M $layer independent PTX mismatch; stopping: $folder" }
+        Get-Content -LiteralPath (Join-Path $folder 'ptx-reference.stdout.log') | Write-Host
+        $summary.layers += @{layer=$layer; passed=$true}
+    }
+    $summary.passed=$true
+} catch { $summary.error=$_.Exception.Message; Write-Warning $summary.error }
+finally {
+    $env:PYTHONPATH=$previousPython; $env:D4R_DIAG_DIR=$previousDiag
+    $summary | ConvertTo-Json -Depth 5 | Set-Content -LiteralPath (Join-Path $OutputDirectory 'summary.json') -Encoding UTF8
+    Write-Host "Private real-weight replay results: $OutputDirectory (do not redistribute captures/allocations)"
+}
+if (!$summary.passed) { exit 1 }