Auto: abcip-3.1 — configurable CIP connection size per device

Closes #235

src/ZB.MOM.WW.OtOpcUa.Driver.AbCip/IAbCipTagRuntime.cs

@@ -73,6 +73,13 @@ public interface IAbCipTagFactory
 ///     to issue a Rockwell array read covering <c>N</c> consecutive elements starting at the
 ///     subscripted index in <see cref="TagName"/>. Drives PR abcip-1.3 array-slice support;
 ///     <c>null</c> leaves libplctag's default scalar-element behaviour for back-compat.</param>
+/// <param name="ConnectionSize">PR abcip-3.1 — CIP Forward Open buffer size in bytes. Threads
+///     through to libplctag's <c>connection_size</c> attribute. The driver always supplies a
+///     value here — either the per-device <see cref="AbCipDeviceOptions.ConnectionSize"/>
+///     override or the family profile's <see cref="PlcFamilies.AbCipPlcFamilyProfile.DefaultConnectionSize"/>.
+///     Bigger packets fit more tags per RTT (higher throughput); smaller packets stay compatible
+///     with legacy firmware (v19-and-earlier ControlLogix caps at 504, Micro800 hard-caps at
+///     488).</param>
 public sealed record AbCipTagCreateParams(
     string Gateway,
     int Port,
@@ -81,4 +88,5 @@ public sealed record AbCipTagCreateParams(
     string TagName,
     TimeSpan Timeout,
     int? StringMaxCapacity = null,
-    int? ElementCount = null);
+    int? ElementCount = null,
+    int ConnectionSize = 4002);