Start counting messages per quarter starting 1 january 2021

src/Core/Database/DatabaseContext.cs

@@ -11,6 +11,7 @@ namespace Geekbot.Core.Database
         public DbSet<KarmaModel> Karma { get; set; }
         public DbSet<ShipsModel> Ships { get; set; }
         public DbSet<RollsModel> Rolls { get; set; }
+        public DbSet<MessageSeasonsModel> MessagesSeasons { get; set; }
         public DbSet<MessagesModel> Messages { get; set; }
         public DbSet<SlapsModel> Slaps { get; set; }
         public DbSet<GlobalsModel> Globals { get; set; }

src/Core/Database/Models/MessageSeasonsModel.cs

@@ -0,0 +1,21 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Geekbot.Core.Database.Models
+{
+    public class MessageSeasonsModel
+    {
+        [Key]
+        public int Id { get; set; }
+        
+        [Required]
+        public long GuildId { get; set; }
+        
+        [Required]
+        public long UserId { get; set; }
+        
+        [Required]
+        public string Season { get; set; }
+        
+        public int MessageCount { get; set; }
+    }
+}