feat(burn-in): capacity burn-in harness (Test-CapacityBurnIn.ps1)

scripts/Test-CapacityBurnIn.ps1 (new): N-way parallel burn-in harness using Start-Job
to launch N concurrent Invoke-CIJob.ps1 child processes for R rounds. After each round
asserts: all VMs destroyed, all jobs got distinct IPs, vm-start.lock gone, ip-leases
empty, wall time recorded. Params: -RepoUrl (mandatory), -IPList = @() (optional,
auto-detects via VMware Tools when empty), -GiteaCredentialTarget = 'GiteaPAT',
-Parallelism = 4, -Rounds = 3, -RoundTimeoutMinutes = 60, plus all Invoke-CIJob params.

scripts/Start-BurnInTest.ps1 (new): lab wrapper with all default params hardcoded
(template F:\CI\Templates\WinBuild2025, credentials BuildVMGuest/GiteaPAT, etc.)
for daily use. Exposes -Rounds, -Parallelism, -BuildCommand, -RoundTimeoutMinutes.

scripts/Start-BurnInTest.ps1

@@ -0,0 +1,72 @@
+#Requires -Version 5.1
+<#
+.SYNOPSIS
+    Wrapper di lancio per Test-CapacityBurnIn.ps1 con i parametri del lab locale.
+
+.DESCRIPTION
+    Esegue il burn-in a 4 job / 3 round contro il repo burnin-dummy su Gitea.
+    Tutti i parametri fissi del lab sono qui hardcoded; i parametri variabili
+    (Rounds, Parallelism, BuildCommand) possono essere sovrascritti da CLI.
+
+    Prerequisiti:
+      - Repo burnin-dummy creato su Gitea (anche vuoto con branch main)
+      - Credenziali guest nel Credential Manager target 'BuildVMGuest'
+      - Gitea PAT nel Credential Manager target 'GiteaPAT'
+          New-StoredCredential -Target 'GiteaPAT' -UserName 'ci' -Password '<pat>' -Persist LocalMachine
+      - Template WinBuild2025 con snapshot BaseClean in stato powered-off
+      - VMware Tools attivo nel guest (per auto-detect IP)
+
+    Esempi di utilizzo:
+        # Run completo (3 round, 4 job paralleli)
+        .\Start-BurnInTest.ps1
+
+        # Smoke veloce (1 round, 2 job)
+        .\Start-BurnInTest.ps1 -Rounds 1 -Parallelism 2
+
+        # Verifica parallelismo reale (build da 2 minuti, 1 round)
+        .\Start-BurnInTest.ps1 -Rounds 1 -BuildCommand 'Start-Sleep 120'
+
+.PARAMETER Rounds
+    Numero di round sequenziali. Default: 3.
+
+.PARAMETER Parallelism
+    Job concorrenti per round. Default: 4.
+
+.PARAMETER BuildCommand
+    Comando da eseguire nel guest come passo build.
+    Default: 'exit 0' (smoke veloce — nessun build reale).
+    Usare 'Start-Sleep 120' per mantenere 4 VM attive e osservare la concorrenza.
+
+.PARAMETER RoundTimeoutMinutes
+    Minuti massimi di attesa per ogni round prima di interrompere i job rimasti.
+    Default: 60.
+#>
+param(
+    [int]    $Rounds              = 3,
+    [int]    $Parallelism         = 4,
+    [string] $BuildCommand        = 'exit 0',
+    [int]    $RoundTimeoutMinutes = 60
+)
+
+Set-StrictMode -Version Latest
+$ErrorActionPreference = 'Stop'
+
+$scriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
+
+& "$scriptDir\Test-CapacityBurnIn.ps1" `
+    -RepoUrl               'http://10.10.20.11:3100/ci/burnin-dummy.git' `
+    -Branch                'main' `
+    -TemplatePath          'F:\CI\Templates\WinBuild2025\WinBuild2025.vmx' `
+    -SnapshotName          'BaseClean' `
+    -CloneBaseDir          'F:\CI\BuildVMs' `
+    -ArtifactBaseDir       'F:\CI\Artifacts' `
+    -GuestCredentialTarget 'BuildVMGuest' `
+    -GiteaCredentialTarget 'GiteaPAT' `
+    -VmrunPath             'C:\Program Files (x86)\VMware\VMware Workstation\vmrun.exe' `
+    -GuestOS               'Auto' `
+    -BuildCommand          $BuildCommand `
+    -Parallelism           $Parallelism `
+    -Rounds                $Rounds `
+    -RoundTimeoutMinutes   $RoundTimeoutMinutes
+
+exit $LASTEXITCODE