refactor: type reward_type columns as UserGoodsType enum

Replace bare `int RewardType` on 12 catalog/reward entities and GrantedReward
with the existing UserGoodsType enum. Verified against the decompiled client:
every wire reward_type decodes through the single Wizard.UserGoods.Type enum, so
one enum is correct across all endpoint families (item_type is a separate
Item.Type axis, left untouched). EF stores the enum as the same int column, so
there is no migration.

- Importers cast seed int -> UserGoodsType at the ingest boundary.
- New GrantedReward.ToRewardList() extension replaces 8 copy-pasted
  GrantedReward -> RewardListEntry projections.
- Fix 3 .ToString() sites that would otherwise emit enum names ("Crystal")
  instead of the int wire value ("2").
- Wire DTOs keep int; the enum is widened to int at the wire boundary only.

Build green; 962/962 tests pass.

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

SVSim.Database/Entities/Story/StoryChapterReward.cs

@@ -1,9 +1,11 @@
+using SVSim.Database.Enums;
+
 namespace SVSim.Database.Entities.Story;
 
 [Microsoft.EntityFrameworkCore.Owned]
 public class StoryChapterReward
 {
-    public int RewardType { get; set; }
+    public UserGoodsType RewardType { get; set; }
     public long RewardDetailId { get; set; }
     public int RewardNumber { get; set; }
 }

SVSim.Database/Models/AchievementCatalogEntry.cs

@@ -1,4 +1,5 @@
 using SVSim.Database.Common;
+using SVSim.Database.Enums;
 
 namespace SVSim.Database.Models;
 
@@ -14,7 +15,7 @@ public class AchievementCatalogEntry
     public int Level { get; set; }
     public string Name { get; set; } = "";
     public int RequireNumber { get; set; }
-    public int RewardType { get; set; }
+    public UserGoodsType RewardType { get; set; }
     public long RewardDetailId { get; set; }
     public int RewardNumber { get; set; }
     public int OrderNum { get; set; }

SVSim.Database/Models/ArenaTwoPickReward.cs

@@ -31,7 +31,7 @@ public class ArenaTwoPickReward
     public int Weight { get; set; } = 1;
 
     /// <summary><see cref="UserGoodsType"/> on the wire (e.g. Item=4, Rupy=9).</summary>
-    public int RewardType { get; set; }
+    public UserGoodsType RewardType { get; set; }
 
     /// <summary>Item id for Item; 0 for currencies.</summary>
     public long RewardId { get; set; }

SVSim.Database/Models/BattlePassMonthlyMissionEntry.cs

@@ -1,5 +1,6 @@
 using System.ComponentModel.DataAnnotations.Schema;
 using SVSim.Database.Common;
+using SVSim.Database.Enums;
 
 namespace SVSim.Database.Models;
 
@@ -20,7 +21,7 @@ public class BattlePassMonthlyMissionEntry : BaseEntity<int>
     public string Name { get; set; } = "";
     public int RequireNumber { get; set; }
     public int BattlePassPoint { get; set; }
-    public int? RewardType { get; set; }
+    public UserGoodsType? RewardType { get; set; }
     public long? RewardDetailId { get; set; }
     public int? RewardNumber { get; set; }
     public string? EventType { get; set; }

SVSim.Database/Models/BattlePassRewardEntry.cs

@@ -13,7 +13,7 @@ public class BattlePassRewardEntry : BaseEntity<long>
     public int SeasonId { get; set; }
     public BattlePassTrack Track { get; set; }
     public int Level { get; set; }
-    public int RewardType { get; set; }
+    public UserGoodsType RewardType { get; set; }
     public long RewardDetailId { get; set; }
     public int RewardNumber { get; set; }
     public bool IsAppealExclusion { get; set; }

SVSim.Database/Models/BuildDeckProductRewardEntry.cs

@@ -1,4 +1,5 @@
 using Microsoft.EntityFrameworkCore;
+using SVSim.Database.Enums;
 
 namespace SVSim.Database.Models;
 
@@ -11,7 +12,7 @@ namespace SVSim.Database.Models;
 public class BuildDeckProductRewardEntry
 {
     public int RewardIndex { get; set; }
-    public int RewardType { get; set; }   // Wizard.UserGoods.Type
+    public UserGoodsType RewardType { get; set; }
     public long RewardDetailId { get; set; }
     public int RewardNumber { get; set; }
     public int MessageId { get; set; }

SVSim.Database/Models/BuildDeckSeriesRewardEntry.cs

@@ -1,4 +1,5 @@
 using Microsoft.EntityFrameworkCore;
+using SVSim.Database.Enums;
 
 namespace SVSim.Database.Models;
 
@@ -13,7 +14,7 @@ public class BuildDeckSeriesRewardEntry
 {
     public int TierIndex { get; set; }   // 1, 2, 3, ... — unlock threshold
     public int ItemIndex { get; set; }   // ordinal within tier
-    public int RewardType { get; set; }
+    public UserGoodsType RewardType { get; set; }
     public long RewardDetailId { get; set; }
     public int RewardNumber { get; set; }
     public int MessageId { get; set; }

SVSim.Database/Models/LeaderSkinShopProductRewardEntry.cs

@@ -1,4 +1,5 @@
 using Microsoft.EntityFrameworkCore;
+using SVSim.Database.Enums;
 
 namespace SVSim.Database.Models;
 
@@ -11,7 +12,7 @@ namespace SVSim.Database.Models;
 public class LeaderSkinShopProductRewardEntry
 {
     public int OrderIndex { get; set; }
-    public int RewardType { get; set; }   // Wizard.UserGoods.Type
+    public UserGoodsType RewardType { get; set; }
     public long RewardDetailId { get; set; }
     public int RewardNumber { get; set; }
 }

SVSim.Database/Models/LeaderSkinShopSeriesRewardEntry.cs

@@ -1,4 +1,5 @@
 using Microsoft.EntityFrameworkCore;
+using SVSim.Database.Enums;
 
 namespace SVSim.Database.Models;
 
@@ -12,7 +13,7 @@ namespace SVSim.Database.Models;
 public class LeaderSkinShopSeriesRewardEntry
 {
     public int OrderIndex { get; set; }
-    public int RewardType { get; set; }
+    public UserGoodsType RewardType { get; set; }
     public long RewardDetailId { get; set; }
     public int RewardNumber { get; set; }
 }

SVSim.Database/Models/MissionCatalogEntry.cs

@@ -1,4 +1,5 @@
 using SVSim.Database.Common;
+using SVSim.Database.Enums;
 
 namespace SVSim.Database.Models;
 
@@ -14,7 +15,7 @@ public class MissionCatalogEntry : BaseEntity<int>
     public string Name { get; set; } = "";
     public int LotType { get; set; }
     public int RequireNumber { get; set; }
-    public int RewardType { get; set; }
+    public UserGoodsType RewardType { get; set; }
     public long RewardDetailId { get; set; }
     public int RewardNumber { get; set; }
     public int BattlePassPoint { get; set; }

SVSim.Database/Models/PuzzleMissionEntry.cs

@@ -1,4 +1,5 @@
 using SVSim.Database.Common;
+using SVSim.Database.Enums;
 
 namespace SVSim.Database.Models;
 
@@ -21,7 +22,7 @@ public class PuzzleMissionEntry : BaseEntity<int>
     public int OrderId { get; set; }
 
     // Reward (single-entry per mission)
-    public int RewardType { get; set; }      // UserGoodsType
+    public UserGoodsType RewardType { get; set; }
     public long RewardDetailId { get; set; }
     public int RewardNumber { get; set; }
 

SVSim.Database/Models/SleeveShopProductRewardEntry.cs

@@ -1,4 +1,5 @@
 using Microsoft.EntityFrameworkCore;
+using SVSim.Database.Enums;
 
 namespace SVSim.Database.Models;
 
@@ -11,7 +12,7 @@ namespace SVSim.Database.Models;
 public class SleeveShopProductRewardEntry
 {
     public int OrderIndex { get; set; }
-    public int RewardType { get; set; }   // Wizard.UserGoods.Type
+    public UserGoodsType RewardType { get; set; }
     public long RewardDetailId { get; set; }
     public int RewardNumber { get; set; }
 }

SVSim.Database/Services/Inventory/InventoryGrantTypes.cs

@@ -11,7 +11,7 @@ namespace SVSim.Database.Services;
 /// <c>/story/*/finish</c>. reward_num is a POST-STATE TOTAL for currencies and a count for
 /// collection grants — see <see cref="Models.RewardListEntry"/>.
 /// </summary>
-public sealed record GrantedReward(int RewardType, long RewardId, int RewardNum);
+public sealed record GrantedReward(UserGoodsType RewardType, long RewardId, int RewardNum);
 
 /// <summary>
 /// Cosmetic projection bundle for /load/index. The four id-lists are "what the viewer owns"

SVSim.Database/Services/Inventory/InventoryTransaction.cs

@@ -309,7 +309,7 @@ internal sealed class InventoryTransaction : IInventoryTransaction
         var output = new List<GrantedReward>();
         foreach (var type in orderedTouches)
         {
-            output.Add(new GrantedReward((int)type, 0, lastCurrencyPost[type]));
+            output.Add(new GrantedReward(type, 0, lastCurrencyPost[type]));
         }
 
         // Pass 2 — non-currency grants: one entry per (type, id) using LAST post-state for items
@@ -326,7 +326,7 @@ internal sealed class InventoryTransaction : IInventoryTransaction
         }
         foreach (var (type, id) in nonCurrencyOrder)
         {
-            output.Add(new GrantedReward((int)type, id, nonCurrencyKey[(type, id)]));
+            output.Add(new GrantedReward(type, id, nonCurrencyKey[(type, id)]));
         }
         return output;
     }
@@ -334,7 +334,7 @@ internal sealed class InventoryTransaction : IInventoryTransaction
     private IReadOnlyList<GrantedReward> BuildDeltas()
         => _ops.OfType<GrantOp>()
             .Where(o => !o.IsCascade)
-            .Select(o => new GrantedReward((int)o.Type, o.DetailId, o.Num))
+            .Select(o => new GrantedReward(o.Type, o.DetailId, o.Num))
             .ToList();
 
     private static bool IsCurrency(UserGoodsType t) =>
@@ -353,7 +353,7 @@ internal sealed class InventoryTransaction : IInventoryTransaction
     };
 
     private static IReadOnlyList<GrantedReward> Single(UserGoodsType type, long id, int num)
-        => new[] { new GrantedReward((int)type, id, num) };
+        => new[] { new GrantedReward(type, id, num) };
 
     private void ThrowIfCommitted()
     {
@@ -381,7 +381,7 @@ internal sealed class InventoryTransaction : IInventoryTransaction
 
         var results = new List<GrantedReward>
         {
-            new((int)UserGoodsType.Card, cardId, postCount),
+            new(UserGoodsType.Card, cardId, postCount),
         };
         _ops.Add(new GrantOp(UserGoodsType.Card, cardId, num, postCount, false));
 
@@ -394,8 +394,8 @@ internal sealed class InventoryTransaction : IInventoryTransaction
         {
             if (TryAddCascadeCosmetic(reward, lookupId))
             {
-                results.Add(new GrantedReward((int)reward.Type, reward.CosmeticId, 1));
-                _ops.Add(new GrantOp((UserGoodsType)(int)reward.Type, reward.CosmeticId, 1, 1, true));
+                results.Add(new GrantedReward((UserGoodsType)reward.Type, reward.CosmeticId, 1));
+                _ops.Add(new GrantOp((UserGoodsType)reward.Type, reward.CosmeticId, 1, 1, true));
             }
         }