Fix Ninja client configuration parsing

src/OCSentinelCli/JsonOptions.cs

@@ -8,6 +8,9 @@ internal static class JsonOptions
     public static readonly JsonSerializerOptions Default = new()
     {
         WriteIndented = true,
+        // Client configuration is also written by PowerShell/NinjaOne scripts.
+        // Accept their conventional camelCase names (for example n8nWebhookUrl).
+        PropertyNameCaseInsensitive = true,
         DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull
     };
 }