added ability to set media class of items

AobaServer/Proto/Types.proto

@@ -41,10 +41,7 @@ message Id {
 }
 
 message MediaResponse {
-	oneof result {
-		MediaModel value = 1;
-		google.protobuf.Empty empty = 2;
-	}
+	optional MediaModel value = 1;
 }
 
 message ListResponse {

AobaServer/Services/AobaRpcService.cs

@@ -17,7 +17,7 @@ public class AobaRpcService(AobaService aobaService, AccountsService accountsSer
 {
 	public override async Task<MediaResponse> GetMedia(Id request, ServerCallContext context)
 	{
-		var media = await aobaService.GetMediaFromLegacyIdAsync(request.ToObjectId(), context.CancellationToken);
+		var media = await aobaService.GetMediaAsync(request.ToObjectId(), context.CancellationToken);
 		return media.ToResponse();
 	}
 

AobaServer/Utils/ProtoExtensions.cs

@@ -35,7 +35,7 @@ public static class ProtoExtensions
 	public static MediaResponse ToResponse(this Media? media)
 	{
 		if(media == null) 
-			return new MediaResponse() { Empty = new Empty() };
+			return new MediaResponse() {};
 		return new MediaResponse()
 		{
 			Value = media.ToMediaModel()