fix(browse): commit the browsed data type, and fix the probe classification the fixture was hiding (#536)

A browse-committed AB CIP / TwinCAT / FOCAS tag bound with its model's DEFAULT
data type, not the one the device reported. A browsed REAL committed as
`{"tagPath":"Pump_1_Speed","dataType":"DInt"}` — and those three drivers decode
the wire bytes by that field, not by the raw row's OPC UA DataType — so the tag
read four bytes of a float through an integer decoder and published a plausible
wrong number with no error raised anywhere. FOCAS was missed when #536 was filed.

The type is CARRIED, not derived. Reverse-mapping the leaf's driver-agnostic
DriverDataType looks like the smaller fix and is wrong: SInt/Int/DInt/USInt/UInt
all collapse into Int32 on the way out of the driver, so that version would bind
a 16-bit INT as a 32-bit DINT while appearing to fix the REAL. Drivers now state
their own type name on DriverAttributeInfo.NativeDataType, which reaches the
picker as AttributeInfo.AddressFields["dataType"] and the commit mapper from
there. A leaf that states nothing keeps the model default — the pre-#536
behaviour, kept deliberately as the fallback rather than a guess.

Numeric strings are refused before parsing: Enum.TryParse accepts "9" for any
enum and Enum.IsDefined then confirms it, so an unguarded parse would bind a tag
to a type nobody named. A test caught this in the first version of the guard.

--- and the other half, which the fixture was hiding ---

Test Connect on a device with NO authored tags — every AB CIP device at the
moment an operator first presses the button — reported "CIP handshake failed"
against a healthy controller. That was written down as a fixture limitation
("ab_server doesn't implement @raw_cpu_type"). Both halves of that were wrong:

  * @raw_cpu_type is not a libplctag special tag at all (only @raw, @tags and
    @udt/ are), so it goes out as an ordinary symbolic name that no controller
    defines, and the controller's "tag does not exist" IS the successful answer.
  * ab_server answered an unresolvable tag path with CIP 0x03 where a Logix
    controller answers 0x04 — ErrorBadParam vs ErrorNotFound, which the probe
    classifies oppositely. Fixed in vendored patch 0002.
  * With the fixture then telling the truth, the real defect surfaced:
    AbCipDriverProbe.IsReachableException matched the native C status spellings
    ("STATUS_NOT_FOUND"), but libplctag.NET throws with the MANAGED enum name
    ("ErrorNotFound"). Those substrings can never match, so the reachable
    classification could not fire on the exception path — which is the path every
    no-authored-tags probe takes. This was failing on real hardware too, not just
    against the sim. It now recovers the Status and defers to IsReachableStatus,
    so there is one classification rather than two that can drift.

Rejected: switching the fallback to @tags. libplctag builds a tag-listing tag
with NO network I/O, so it reports OK against any TCP listener — measured green
against a Mosquitto broker.

Verification: full solution suite green. Falsification runs confirm exactly the
intended tests go red — 9 for the type carry, 3 (the reachable statuses only) for
the probe classification. Live on docker-dev: browse-committed TestString/
Motor_Run/TestSINT now store String/Bool/SInt, alongside last session's
Pump_1_Speed still holding the wrong DInt. TestSINT is the falsifier — its row
DataType is Int32, identical to TestDINT's, so no reverse map could have produced
"SInt".

Known consequence: pre-existing browse-committed tags keep their wrong dataType;
the fix applies to new commits only.

Claude-Session: https://claude.ai/code/session_015p7wGqy3YpZNCpDzTpGMKo

src/Core/ZB.MOM.WW.OtOpcUa.Commons/Browsing/CapturedTreeBrowseSession.cs

@@ -50,7 +50,7 @@ public sealed class CapturedTreeBrowseSession(CapturedTree tree) : IBrowseSessio
         var attrs = new List<AttributeInfo>();
         if (n.Attribute is { } a)
             attrs.Add(new AttributeInfo(n.Name, a.DriverDataType.ToString(), a.IsArray,
-                a.SecurityClass.ToString(), a.IsAlarm || n.IsAlarmMarked));
+                a.SecurityClass.ToString(), a.IsAlarm || n.IsAlarmMarked, NativeTypeFields(a)));
         attrs.AddRange(n.Properties.Select(p =>
             new AttributeInfo(p.Name, p.Type.ToString(), false, "", false)));
         return Task.FromResult<IReadOnlyList<AttributeInfo>>(attrs);
@@ -65,6 +65,29 @@ public sealed class CapturedTreeBrowseSession(CapturedTree tree) : IBrowseSessio
 
     private CapturedTree Tree() => _tree ?? throw new ObjectDisposedException(nameof(CapturedTreeBrowseSession));
 
+    /// <summary>
+    ///     Surfaces a leaf's driver-native type name as the <c>dataType</c> address field, so a
+    ///     browse-commit can stamp the driver-typed <c>TagConfig</c> with the type the controller
+    ///     actually reported (Gitea #536).
+    /// </summary>
+    /// <param name="a">The captured attribute.</param>
+    /// <returns>The address fields, or null when the driver reported no native type.</returns>
+    /// <remarks>
+    ///     It rides <see cref="AttributeInfo.AddressFields"/> rather than
+    ///     <see cref="AttributeInfo.DriverDataType"/> because that field is the driver-AGNOSTIC
+    ///     type and several consumers already read it as such. The commit mapper cannot recover the
+    ///     native type from it: <c>SInt</c>/<c>Int</c>/<c>DInt</c> all arrive as <c>Int32</c>, so a
+    ///     reverse map would bind a 16-bit INT as a 32-bit DINT and read four bytes for two.
+    ///     <para>
+    ///     Null when the driver stamped nothing — the mapper then leaves the model's own default in
+    ///     place, which is exactly the pre-#536 behaviour rather than a guess.
+    ///     </para>
+    /// </remarks>
+    private static IReadOnlyDictionary<string, string>? NativeTypeFields(DriverAttributeInfo a)
+        => string.IsNullOrWhiteSpace(a.NativeDataType)
+            ? null
+            : new Dictionary<string, string>(StringComparer.Ordinal) { ["dataType"] = a.NativeDataType };
+
     private static BrowseNode Map(CapturedNode n) => n.IsLeaf
         ? new BrowseNode(n.Id, n.DisplayName, BrowseNodeKind.Leaf, false)
         : new BrowseNode(n.Id, n.DisplayName, BrowseNodeKind.Folder, n.Children.Count > 0);

src/Core/ZB.MOM.WW.OtOpcUa.Core.Abstractions/DriverAttributeInfo.cs

@@ -45,6 +45,21 @@ namespace ZB.MOM.WW.OtOpcUa.Core.Abstractions;
 ///     Set when <paramref name="Source"/> is <see cref="NodeSourceKind.ScriptedAlarm"/> —
 ///     stable logical id the ScriptedAlarmEngine addresses by. Null otherwise.
 /// </param>
+/// <param name="NativeDataType">
+///     The driver's OWN type name for this attribute (e.g. <c>"Real"</c> for an
+///     <c>AbCipDataType</c>, <c>"Int16"</c> for a <c>TwinCATDataType</c>) when the driver binds
+///     by a driver-specific type enum in its <c>TagConfig</c>; null for a driver whose tag config
+///     carries no type (OPC UA Client, Galaxy) or which takes the type from the wire (MQTT
+///     Sparkplug births, MTConnect probe inference).
+///     <para>
+///     <b>It exists because <paramref name="DriverDataType"/> is lossy in exactly the direction a
+///     browse-commit needs</b> (Gitea #536): <c>AbCipDataType.SInt</c>, <c>.Int</c> and <c>.DInt</c>
+///     all map to <see cref="DriverDataType.Int32"/>, so a commit that reverse-mapped the
+///     driver-agnostic type would bind a 16-bit INT as a 32-bit DINT. Nothing downstream of the
+///     address-space build reads this — it is authoring metadata carried alongside the type the
+///     node manager actually uses.
+///     </para>
+/// </param>
 public sealed record DriverAttributeInfo(
     string FullName,
     DriverDataType DriverDataType,
@@ -56,7 +71,8 @@ public sealed record DriverAttributeInfo(
     bool WriteIdempotent = false,
     NodeSourceKind Source = NodeSourceKind.Driver,
     string? VirtualTagId = null,
-    string? ScriptedAlarmId = null);
+    string? ScriptedAlarmId = null,
+    string? NativeDataType = null);
 
 /// <summary>
 ///     Discriminates which runtime subsystem owns this node's Read/Write/