fix: FindArrayInClosure — search plain objects in object[] (display class pattern)

[korchak-aleksandr]

Problem

FindArrayInClosure only recursed into Delegate.Target when searching object[] items. But Closure.Constants can contain a plain <>c__DisplayClass object (not a Delegate) that holds the actual array:

Closure
  .Constants = Object[]
    [0] = <>c__DisplayClass15_0   ← plain object, not Delegate
           .allowedIds = int[]    ← the array we need

This caused TryExtractArrayFromSpanExpression to return null for Pattern 2 when used via ExecuteWithQueryCompilation in Mindbox.Framework, resulting in NotSupportedException at runtime.

Fix

One-liner: recurse into any non-null item in object[], not just Delegate.Target.

// before
if (item is Delegate nested && nested.Target != null) {
    var found = FindArrayInClosure(nested.Target, arrayType, depth + 1);

// after
var searchTarget = item is Delegate nested ? nested.Target : item;
if (searchTarget != null) {
    var found = FindArrayInClosure(searchTarget, arrayType, depth + 1);

[korchak-aleksandr]

Closing: Framework handles MemoryExtensions.Contains normalization before expressions reach data-linq, so this fix is not needed.