docs(twincat): native array notifications, sub-range / size-cap rules, live TC2 gate record

Removes the 'use UseNativeNotifications=false for arrays' workaround and
documents the raw-bytes array model shared by poll and notification: element
checks, STRING arrays, multi-dim flattening, 0-based publication, leading
sub-range for a shorter arrayLength, refusals (struct/UDT arrays, too long,
scalar over array), the 128 KiB native cap (BadOutOfRange), the bit-path fix,
and the 2026-10-07 read-only live gate on Z33856 / Z33733.

docs/drivers/TwinCAT-Test-Fixture.md

@@ -93,6 +93,11 @@ All tests gate on `TWINCAT_TARGET_NETID` (required) via `[TwinCATFact]` /
   `BrowseSymbolsAsync` + system-symbol filtering
 - `TwinCATNativeNotificationTests` — `AddDeviceNotification` registration,
   callback-delivery-to-`OnDataChange` wiring, unregister on unsubscribe
+- `TwinCATNativeArraySubscribeTests` — array tags register with their authored
+  length, replay after reconnect, and a refused tag is isolated with its status
+- `TwinCATArrayCodecTests` — array layout planning / validation
+  (`TwinCATTypeGuard.CheckArray`, size cap) + raw-bytes decode of every element type
+- `TwinCATBitAccessTests` — bit-indexed BOOL notifications served from the parent word
 - `TwinCATDriverTests` — `IDriver` lifecycle
 
 Capability surfaces whose contract is verified at the unit layer: `IDriver`,