fix(endpoint): preserve app template keys

Parse app template config JSON with `-AsHashtable` before converting it back to a PSCustomObject so templates can carry both `applicationName` and `ApplicationName` without losing data. This avoids deployment issues caused by PowerShell's default case-insensitive JSON object handling.

Author: Zacgoose

Modules/CIPPHTTP/Public/Entrypoints/HTTP Functions/Endpoint/Applications/Invoke-ExecDeployAppTemplate.ps1

@@ -51,7 +51,12 @@ function Invoke-ExecDeployAppTemplate {
             try {
                 $Config = $App.config
                 if ($Config -is [string]) {
-                    $Config = $Config | ConvertFrom-Json -Depth 100
+                    # Parse case-sensitive to survive templates carrying both 'applicationName'
+                    # and 'ApplicationName', then collapse them via a case-insensitive dictionary.
+                    $Parsed = $Config | ConvertFrom-Json -Depth 100 -AsHashtable
+                    $Config = [ordered]@{}
+                    foreach ($Key in $Parsed.Keys) { $Config[$Key] = $Parsed[$Key] }
+                    $Config = [PSCustomObject]$Config
                 }
 
                 $AppType = "$($App.appType ?? $App.AppType)"