wip(step2e): parameterised chamber-graph model -- compiles, traversal test PASS; benchmark not run

Stopped by low memory (another app held 12.5 GB; processes failed with 0xC0000142).
Editor-only, default off: a seeded connected room graph (varied chambers on a spanning network,
optional loops, shafts, rock features, ledges, basin floors), eight parameter profiles, the
step-2d brick driver and detail bands, a new test VoxelForge.ParameterizedGeneration.TraversalSeeds
(PASS in step2e_functional_01, which also proves the tree compiles). Existing live tests untouched.
Not yet run: the eight-profile ring benchmark, variety metrics, slices, detail/artefact/determinism
checks.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MmSoF64BbRFmk9C3p1VsBJ

Tools/VoxelForgeTest.ps1

@@ -1,6 +1,6 @@
 [CmdletBinding()]
 param(
-    [ValidateSet('canonical', 'owner', 'probe', 'perf', 'visual-edit', 'visual-lod', 'visual-gap-walk', 'visual-gap-inject', 'dig-motion', 'tests', 'surface-fall', 'crossing', 'gate-stress', 'parity', 'horizon', 'horizon-render', 'determinism', 'symbolize-stacks', 'region-eval', 'step2d')]
+    [ValidateSet('canonical', 'owner', 'probe', 'perf', 'visual-edit', 'visual-lod', 'visual-gap-walk', 'visual-gap-inject', 'dig-motion', 'tests', 'surface-fall', 'crossing', 'gate-stress', 'parity', 'horizon', 'horizon-render', 'determinism', 'symbolize-stacks', 'region-eval', 'step2d', 'step2e')]
     [string]$Scenario = 'canonical',
     [switch]$Build,
     [switch]$EnableRender,
@@ -575,7 +575,7 @@ function Sync-OwnerAssets {
         $null = Copy-Item -LiteralPath $source -Destination $target -Force -PassThru
         [void]$rows.Add([ordered]@{
             name = $assetName
-            used_by_scenario = $Scenario -in @('owner', 'probe', 'parity', 'tests', 'surface-fall', 'crossing', 'gate-stress', 'visual-edit', 'visual-lod', 'visual-gap-walk', 'visual-gap-inject', 'dig-motion', 'horizon', 'horizon-render', 'determinism', 'region-eval', 'step2d')
+            used_by_scenario = $Scenario -in @('owner', 'probe', 'parity', 'tests', 'surface-fall', 'crossing', 'gate-stress', 'visual-edit', 'visual-lod', 'visual-gap-walk', 'visual-gap-inject', 'dig-motion', 'horizon', 'horizon-render', 'determinism', 'region-eval', 'step2d', 'step2e')
             source_path = $source
             source_sha256 = Get-Sha256 $source
             staged_path = $target
@@ -623,7 +623,7 @@ function Get-AssetEvidence {
         $target = Join-Path $HostRoot "Content\VoxelForge\$assetName.uasset"
         [void]$rows.Add([ordered]@{
             name = $assetName
-            used_by_scenario = $Scenario -in @('owner', 'probe', 'parity', 'tests', 'surface-fall', 'crossing', 'gate-stress', 'visual-edit', 'visual-lod', 'visual-gap-walk', 'visual-gap-inject', 'dig-motion', 'horizon', 'horizon-render', 'determinism', 'region-eval', 'step2d')
+            used_by_scenario = $Scenario -in @('owner', 'probe', 'parity', 'tests', 'surface-fall', 'crossing', 'gate-stress', 'visual-edit', 'visual-lod', 'visual-gap-walk', 'visual-gap-inject', 'dig-motion', 'horizon', 'horizon-render', 'determinism', 'region-eval', 'step2d', 'step2e')
             source_path = $source
             source_sha256 = Get-Sha256 $source
             staged_path = $target
@@ -1499,6 +1499,33 @@ try {
                 }
             }
         }
+        'step2e' {
+            $step2eLog = Join-Path $RunRoot 'Logs\step2e.log'
+            $args = New-CommonArguments 'commandlet' $step2eLog (Merge-Cvars $baseCvars)
+            $args += New-CommandletArguments $commandletOut 'walk,export' ($Assets -eq 'owner') $false 128
+            $researchOut = Join-Path $PluginRoot "Saved\Research\step2e\$Label"
+            $args += @('-step2e', '-regionworkers=6', ('-researchout="{0}"' -f $researchOut))
+            $commandletLedger = Invoke-UnrealLaunch 'step2e-commandlet' $args `
+                $step2eLog (Join-Path $RunRoot 'Logs\step2e.stdout.log') `
+                (Join-Path $RunRoot 'Logs\step2e.stderr.log')
+            $step2eReportPath = Join-Path $researchOut 'step2e_report.json'
+            $step2eReport = Read-JsonFile $step2eReportPath
+            if ($null -eq $step2eReport) {
+                $CommandletMetrics = [ordered]@{ status = 'missing'; output = $researchOut; report = $step2eReportPath }
+                Add-Failure "step2e did not produce $step2eReportPath"
+            } else {
+                $CommandletMetrics = [ordered]@{
+                    status = if ((Get-JsonValue $step2eReport 'pass' $false) -and $commandletLedger.status -eq 'passed') { 'passed' } else { 'failed' }
+                    output = $researchOut
+                    report = $step2eReportPath
+                    worst_profile_meets_600ms = Get-JsonValue $step2eReport 'worst_profile_meets_600ms' $false
+                    result = $step2eReport
+                }
+                if (-not (Get-JsonValue $step2eReport 'pass' $false)) {
+                    Add-Failure 'step2e profile speed, detail, boundary, bound-audit, or determinism gate failed'
+                }
+            }
+        }
         'symbolize-stacks' {
             if (([string]::IsNullOrWhiteSpace($StackSamplesPath)) -or -not (Test-Path -LiteralPath $StackSamplesPath -PathType Leaf)) {
                 throw "-StackSamplesPath must name an existing raw sampler CSV."
@@ -1904,6 +1931,7 @@ $result = [ordered]@{
     probe_amplitudes = if ($CommandletMetrics.Contains('probe_amplitudes')) { $CommandletMetrics.probe_amplitudes } else { [ordered]@{} }
     commandlet = $CommandletMetrics
     region_eval = if ($Scenario -eq 'region-eval') { $CommandletMetrics } else { $null }
+    step2e = if ($Scenario -eq 'step2e') { $CommandletMetrics } else { $null }
     game = $GameMetrics
     horizon = $HorizonMetrics
     horizon_render = $HorizonRenderMetrics