fix(backend): make API types internal

backend/src/Socialize.Api/Modules/Assets/Handlers/CreateAssetRevision.cs

@@ -10,12 +10,12 @@ using System.Text.Json;
 
 namespace Socialize.Api.Modules.Assets.Handlers;
 
-public record CreateAssetRevisionRequest(
+internal record CreateAssetRevisionRequest(
     string SourceReference,
     string? PreviewUrl,
     string? Notes);
 
-public class CreateAssetRevisionRequestValidator
+internal class CreateAssetRevisionRequestValidator
     : Validator<CreateAssetRevisionRequest>
 {
     public CreateAssetRevisionRequestValidator()
@@ -26,7 +26,7 @@ public class CreateAssetRevisionRequestValidator
     }
 }
 
-public class CreateAssetRevisionHandler(
+internal class CreateAssetRevisionHandler(
     AppDbContext dbContext,
     AccessScopeService accessScopeService,
     IContentItemActivityWriter activityWriter,