Add local Windows Server inventory collection and validation; include core package

powershell/Get-ServerSystem.ps1

@@ -0,0 +1,34 @@
+function Get-SamsaraSystem {
+    param($Result)
+    $Result.data = [ordered]@{
+        hostname = [Environment]::MachineName; platform = 'windows'
+        collection_source = 'Local Windows read-only collection'
+        operating_system = 'Not collected'; os_version = 'Not collected'; os_build = 'Not collected'
+        product_type = 0; last_boot = 'Not collected'; ip_addresses = @(); network_adapters = @()
+        domain = 'Not collected'; domain_joined = $null
+    }
+    Invoke-SamsaraRead $Result 'OS identity' {
+        $os = Get-CimInstance -ClassName Win32_OperatingSystem -Property Caption,Version,BuildNumber,LastBootUpTime,ProductType -ErrorAction Stop
+        $years = @{ '14393' = '2016'; '17763' = '2019'; '20348' = '2022'; '26100' = '2025' }
+        if ([int]$os.ProductType -notin @(2,3) -or -not $years.ContainsKey([string]$os.BuildNumber)) {
+            throw 'Unsupported Windows release or workstation edition.'
+        }
+        $Result.data.operating_system = [string]$os.Caption
+        $Result.data.os_version = $years[[string]$os.BuildNumber]
+        $Result.data.os_build = [string]$os.BuildNumber
+        $Result.data.kernel_version = [string]$os.Version
+        $Result.data.product_type = [int]$os.ProductType
+        $Result.data.last_boot = $os.LastBootUpTime.ToUniversalTime().ToString('o')
+    }
+    Invoke-SamsaraRead $Result 'Computer domain membership' {
+        $computer = Get-CimInstance -ClassName Win32_ComputerSystem -Property Domain,PartOfDomain -ErrorAction Stop
+        $Result.data.domain = [string]$computer.Domain
+        $Result.data.domain_joined = [bool]$computer.PartOfDomain
+    }
+    Invoke-SamsaraRead $Result 'Network adapter configuration' {
+        $adapters = @(Get-CimInstance -ClassName Win32_NetworkAdapterConfiguration -Filter 'IPEnabled = True' -Property Description,IPAddress -ErrorAction Stop)
+        $Result.data.network_adapters = @($adapters | ForEach-Object { [string]$_.Description })
+        $Result.data.ip_addresses = @($adapters | ForEach-Object { foreach ($address in $_.IPAddress) { [string]$address } })
+    }
+    $Result.limitations += 'Identity and addresses are local observations. No DNS probes or Active Directory enrichment were performed.'
+}