refactor(campaign): delegate gift-reward-type check to GiftRewardTypes

Delete local IsSupportedGiftRewardType and replace its single call site with
GiftRewardTypes.IsSupported — Card (5) and Sleeve (6) are now accepted.
Update unsupported-type test sentinel from 5 (Card) to 11 (SpotCard).
Add Card and Sleeve success-path tests; full suite 1152/1152.

SVSim.EmulatedEntrypoint/Controllers/CampaignController.cs

@@ -4,6 +4,7 @@ using SVSim.Database;
 using SVSim.Database.Enums;
 using SVSim.Database.Models;
 using SVSim.EmulatedEntrypoint.Models.Dtos.Campaign;
+using SVSim.EmulatedEntrypoint.Services;
 
 namespace SVSim.EmulatedEntrypoint.Controllers;
 
@@ -41,7 +42,7 @@ public sealed class CampaignController : SVSimController
             .AnyAsync(r => r.ViewerId == viewerId && r.SerialCodeId == code.Id, ct);
         if (alreadyRedeemed) return Fail();
 
-        if (code.Rewards.Any(r => !IsSupportedGiftRewardType(r.RewardType))) return Fail();
+        if (code.Rewards.Any(r => !GiftRewardTypes.IsSupported(r.RewardType))) return Fail();
 
         try
         {
@@ -82,12 +83,4 @@ public sealed class CampaignController : SVSimController
 
     private IActionResult Fail() => Ok(new { result_code = FailureResultCode });
 
-    /// <summary>
-    /// Gift wire types per <c>GiftController.WireRewardTypeToUserGoodsType</c>:
-    /// 1=Crystal, 4=Item, 9=Rupy. Codes with unsupported types fail-fast at redemption.
-    /// Note: wire "1" means Crystal (not RedEther), following the gift wire convention
-    /// rather than the <see cref="UserGoodsType"/> enum order.
-    /// </summary>
-    private static bool IsSupportedGiftRewardType(int rewardType) =>
-        rewardType is 1 or 4 or 9;
 }