🐛 Fix poll cache

DysonNetwork.Sphere/Poll/Poll.cs

@@ -17,7 +17,7 @@ public class Poll : ModelBase
     public Instant? EndedAt { get; set; }
     
     public Guid PublisherId { get; set; }
-    public Publisher.Publisher Publisher { get; set; } = null!;
+    [JsonIgnore] public Publisher.Publisher? Publisher { get; set; }
 }
 
 public enum PollQuestionType

DysonNetwork.Sphere/Poll/PollService.cs

@@ -43,12 +43,13 @@ public class PollService(AppDatabase db, ICacheService cache)
         var poll = await db.Polls
             .Where(e => e.Id == id)
             .Include(e => e.Questions)
+            .AsNoTracking()
             .FirstOrDefaultAsync();
 
-        if (poll is not null)
-        {
-            await cache.SetAsync(cacheKey, poll, TimeSpan.FromMinutes(30));
-        }
+        if (poll is null) return null;
+        
+        poll.Publisher = null;
+        await cache.SetAsync(cacheKey, poll, TimeSpan.FromMinutes(30));
 
         return poll;
     }