🐛 Trying to fix poll answer cache

DysonNetwork.Sphere/Poll/Poll.cs

@@ -60,5 +60,5 @@ public class PollAnswer : ModelBase
 
     public Guid AccountId { get; set; }
     public Guid PollId { get; set; }
-    [JsonIgnore] public Poll Poll { get; set; } = null!;
+    [JsonIgnore] public Poll? Poll { get; set; }
 }

DysonNetwork.Sphere/Poll/PollService.cs

@@ -51,7 +51,10 @@ public class PollService(AppDatabase db, ICacheService cache)
 
         var answer = await db.PollAnswers
             .Where(e => e.PollId == pollId && e.AccountId == accountId)
+            .AsNoTracking()
             .FirstOrDefaultAsync();
+        if (answer is not null)
+            answer.Poll = null;
 
         // Set the answer even it is null, which stands for unanswered
         await cache.SetAsync(cacheKey, answer, TimeSpan.FromMinutes(30));