Add new functions for credential handling, node lookup, and context-aware parameter overrides; update module version to 1.2.0

Private/ConvertTo-ConfigurationDataDomainCredential.ps1

@@ -0,0 +1,26 @@
+function ConvertTo-ConfigurationDataDomainCredential {
+    [CmdletBinding()]
+    Param(
+        [Parameter(Mandatory=$true)]
+        [System.Management.Automation.PSCredential]
+        $Credential,
+
+        [Parameter(Mandatory=$true)]
+        [string]
+        $Domain
+    )
+
+    if([string]::IsNullOrWhiteSpace($Domain)){
+        throw "Credential domain must not be empty."
+    }
+
+    $UserName = [string]$Credential.UserName
+    if($UserName.Contains("\") -or $UserName.Contains("@")){
+        return $Credential
+    }
+
+    return [System.Management.Automation.PSCredential]::new(
+        "$Domain\$UserName",
+        $Credential.Password
+    )
+}