test(battlenode): target-discriminating + documented choice shape (M-HC-4c review)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

SVSim.UnitTests/BattleNode/Integration/NodeNativeBattleHarness.cs

@@ -97,7 +97,9 @@ internal sealed class NodeNativeBattleHarness : IDisposable
     /// <c>card_id=121011010:120011010,...</c> — i.e. "choose ONE of two tokens to add to hand"
     /// (<see cref="ChoiceTokenA"/> / <see cref="ChoiceTokenB"/>). The choice OUTCOME is directly
     /// observable: the chosen token lands in the caster's hand, so a test can assert which branch
-    /// resolved by the new hand card's identity. Present + creatable in cards.json.</summary>
+    /// resolved by the new hand card's identity. (The token resolves into HAND — confirmed against the
+    /// capture's <c>orderList.add{to:20}</c> hand-zone op — despite the skill_option <c>summon_side=me</c>
+    /// superficially reading like a summon-to-board.) Present + creatable in cards.json.</summary>
     public const long ChoiceCardId = 127011010;
 
     /// <summary>The first choice option of <see cref="ChoiceCardId"/> (token added to hand).</summary>
@@ -328,6 +330,9 @@ internal sealed class NodeNativeBattleHarness : IDisposable
         {
             new Dictionary<string, object?>
             {
+                // The real capture sends type:1 (int); "Choice" (string) is equivalent — the receiver does
+                // Enum.Parse(KeyActionType, type.ToString()) and KeyActionType.Choice == 1, so the string and
+                // the int both parse to the same enum value.
                 ["type"] = "Choice",
                 ["cardId"] = playedCardId,
                 // The RECEIVE parse reads selectCard via ConvertToListInt (NetworkBattleReceiver.cs:1202),