feat(s7): 1-D array block read + decode loop + IsArray discovery

src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.S7.Contracts/S7DriverOptions.cs

@@ -104,13 +104,22 @@ public sealed class S7ProbeOptions
 ///     value can be written again without side-effects. Unsafe: M (merker) bits or Q (output)
 ///     coils that drive edge-triggered routines in the PLC program.
 /// </param>
+/// <param name="ArrayCount">
+///     Element count when the tag is a 1-D array; <c>null</c> (or <c>&lt;= 1</c>) for a scalar.
+///     For an equipment tag this is threaded from the <c>TagConfig</c> JSON's <c>arrayLength</c>
+///     (honoured only when <c>isArray</c> is true) by <see cref="S7EquipmentTagParser"/>. When
+///     set, the driver issues a single contiguous block read of
+///     <c>ArrayCount × element-bytes</c> from the tag's start address and decodes each element
+///     into an element-typed CLR array (<c>short[]</c> / <c>int[]</c> / <c>float[]</c> / etc.).
+/// </param>
 public sealed record S7TagDefinition(
     string Name,
     string Address,
     S7DataType DataType,
     bool Writable = true,
     int StringLength = 254,
-    bool WriteIdempotent = false);
+    bool WriteIdempotent = false,
+    int? ArrayCount = null);
 
 public enum S7DataType
 {