fix(abcip,adminui): ParseEnum device wording + libplctag probe assertion (#574); AB forms preserve unknown keys + MaxConcurrentReads (#576); probe off for new AbCip driver (#577); docs T4:0.DN (#584)

Claude-Session: https://claude.ai/code/session_01Ef2ozxS7QPanGT8uoATbTe

src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.AbCip/AbCipDriverFactoryExtensions.cs

@@ -84,7 +84,7 @@ public static class AbCipDriverFactoryExtensions
                 ? [.. dto.Devices.Select(d => new AbCipDeviceOptions(
                     HostAddress: d.HostAddress ?? throw new InvalidOperationException(
                         $"AB CIP config for '{driverInstanceId}' has a device missing HostAddress"),
-                    PlcFamily: ParseEnum<AbCipPlcFamily>(d.PlcFamily, "device", driverInstanceId, "PlcFamily",
+                    PlcFamily: ParseEnum<AbCipPlcFamily>(d.PlcFamily, tagName: null, driverInstanceId, "PlcFamily",
                         fallback: AbCipPlcFamily.ControlLogix),
                     DeviceName: d.DeviceName,
                     AllowPacking: d.AllowPacking,
@@ -130,7 +130,8 @@ public static class AbCipDriverFactoryExtensions
     private static TimeSpan PositiveTimeoutOrDefault(int? ms, int defaultMs) =>
         TimeSpan.FromMilliseconds(ms is int v and > 0 ? v : defaultMs);
 
-    // tagName null = a driver-level field: the error text names the driver config, not a tag.
+    // tagName null = a driver-level (or device-level) config field: the error text names the driver config,
+    // not a tag. Never pass a placeholder like "device" as tagName — it renders as "tag 'device'" (#574).
     private static T ParseEnum<T>(string? raw, string? tagName, string driverInstanceId, string field,
         T? fallback = null) where T : struct, Enum
     {