tools: add offline rpa window watchdog

scripts/test-open-offline-real-client-window-watchdog.ps1

@@ -0,0 +1,45 @@
+param(
+    [string]$ScriptPath = "scripts/open-offline-real-client-window.ps1"
+)
+
+$ErrorActionPreference = "Stop"
+$repo = Resolve-Path -LiteralPath (Join-Path $PSScriptRoot "..")
+$target = if ([System.IO.Path]::IsPathRooted($ScriptPath)) {
+    $ScriptPath
+}
+else {
+    Join-Path $repo $ScriptPath
+}
+
+if (-not (Test-Path -LiteralPath $target)) {
+    throw "script not found: $target"
+}
+
+$text = Get-Content -LiteralPath $target -Raw
+
+$requiredPatterns = @(
+    @{ Name = "WatchSeconds parameter"; Pattern = '\[int\]\$WatchSeconds' },
+    @{ Name = "PollIntervalMs parameter"; Pattern = '\[int\]\$PollIntervalMs' },
+    @{ Name = "watch loop output"; Pattern = 'watch_iteration_count' },
+    @{ Name = "relaunch counter output"; Pattern = 'relaunch_count' },
+    @{ Name = "move repair counter output"; Pattern = 'repair_count' },
+    @{ Name = "closed window recovery"; Pattern = 'Relaunch-OfflineClient' },
+    @{ Name = "moved window recovery"; Pattern = 'Repair-ClientWindowPlacement' }
+)
+
+$missing = @()
+foreach ($item in $requiredPatterns) {
+    if ($text -notmatch $item.Pattern) {
+        $missing += $item.Name
+    }
+}
+
+if ($missing.Count -gt 0) {
+    throw "watchdog contract missing: $($missing -join ', ')"
+}
+
+[pscustomobject]@{
+    ok = $true
+    script = $target
+    checked = $requiredPatterns.Count
+} | ConvertTo-Json -Compress