Add a few nullabilities and DCC excludes

osu.Game/Database/IHasRealmFiles.cs

@@ -4,6 +4,8 @@
 using System.Collections.Generic;
 using osu.Game.Models;
 
+#nullable enable
+
 namespace osu.Game.Database
 {
     /// <summary>

osu.Game/Database/INamedFile.cs

@@ -3,15 +3,17 @@
 
 using osu.Game.Models;
 
+#nullable enable
+
 namespace osu.Game.Database
 {
     /// <summary>
-    /// Represent a join model which gives a filename and scope to a <see cref="File"/>.
+    /// Represents a join model which gives a filename and scope to a <see cref="File"/>.
     /// </summary>
     public interface INamedFile
     {
-        public string Filename { get; set; }
+        string Filename { get; set; }
 
-        public RealmFile File { get; set; }
+        RealmFile File { get; set; }
     }
 }

osu.Game/Models/RealmBeatmapDifficulty.cs

@@ -1,6 +1,7 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using osu.Framework.Testing;
 using osu.Game.Beatmaps;
 using Realms;
 
@@ -8,6 +9,7 @@ using Realms;
 
 namespace osu.Game.Models
 {
+    [ExcludeFromDynamicCompile]
     [MapTo("BeatmapDifficulty")]
     public class RealmBeatmapDifficulty : EmbeddedObject, IBeatmapDifficultyInfo
     {

osu.Game/Models/RealmFile.cs

@@ -2,6 +2,7 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System.IO;
+using osu.Framework.Testing;
 using osu.Game.IO;
 using Realms;
 
@@ -9,6 +10,7 @@ using Realms;
 
 namespace osu.Game.Models
 {
+    [ExcludeFromDynamicCompile]
     [MapTo("File")]
     public class RealmFile : RealmObject, IFileInfo
     {

osu.Game/Models/RealmNamedFileUsage.cs

@@ -2,6 +2,7 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using JetBrains.Annotations;
+using osu.Framework.Testing;
 using osu.Game.Database;
 using osu.Game.IO;
 using Realms;
@@ -10,6 +11,7 @@ using Realms;
 
 namespace osu.Game.Models
 {
+    [ExcludeFromDynamicCompile]
     public class RealmNamedFileUsage : EmbeddedObject, INamedFile, INamedFileUsage
     {
         public RealmFile File { get; set; } = null!;

osu.Game/Stores/RealmFileStore.cs

@@ -8,6 +8,7 @@ using osu.Framework.Extensions;
 using osu.Framework.IO.Stores;
 using osu.Framework.Logging;
 using osu.Framework.Platform;
+using osu.Framework.Testing;
 using osu.Game.Database;
 using osu.Game.Models;
 using Realms;
@@ -19,6 +20,7 @@ namespace osu.Game.Stores
     /// <summary>
     /// Handles the storing of files to the file system (and database) backing.
     /// </summary>
+    [ExcludeFromDynamicCompile]
     public class RealmFileStore
     {
         private readonly RealmContextFactory realmFactory;