test(opcua): applier forwards array params + overflow rows + doc fix (review)

Extends RecordingSink to capture isArray/arrayLength per EnsureVariable call,
adds two applier-level tests asserting the wire-through for array and scalar
plans, adds float/overflow InlineData rows to ExtractTagArray theory, and
corrects the ExtractTagArray XML-doc wording (null => unbounded ArrayDimensions=[0]).

src/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer/Phase7Composer.cs

@@ -551,7 +551,8 @@ public static class Phase7Composer
     /// <summary>Parses the optional array intent from a tag's <c>TagConfig</c> JSON: the <c>isArray</c>
     /// bool (absent / not a bool / non-object root / blank / malformed ⇒ <c>false</c>) and the optional
     /// <c>arrayLength</c> uint. The length is honoured ONLY when <c>isArray</c> is true AND the prop is a
-    /// JSON number that fits <c>uint</c> (else <c>null</c> ⇒ unbounded, resolved later). Mirrors
+    /// JSON number that fits <c>uint</c> (else <c>null</c> ⇒ unbounded 1-D array,
+    /// <c>ArrayDimensions=[0]</c> at materialisation). Mirrors
     /// <see cref="ExtractTagHistorize"/> exactly in structure + null/blank/non-object/malformed-JSON
     /// tolerance. Never throws. The artifact-decode side
     /// (<c>DeploymentArtifact.ExtractTagArray</c>) MUST parse identically (byte-parity).</summary>