chore(codebase): full cleanup pass

backend/Modules/Creators/Features/ChangeLogo.cs

@@ -44,11 +44,11 @@ public class ChangeLogoHandler(
         ChangeLogoRequest request,
         CancellationToken ct)
     {
-        var creator = await context
+        Creator? creator = await context
             .Creators
             .SingleOrDefaultAsync(
                 c => c.Id == request.CreatorId,
-                cancellationToken: ct);
+                ct);
 
         if (creator is null)
         {
@@ -56,7 +56,7 @@ public class ChangeLogoHandler(
             return;
         }
 
-        var blobUrl = await blobStorage.UploadFileAsync(
+        string blobUrl = await blobStorage.UploadFileAsync(
             ContainerNames.Creators,
             $"{request.CreatorId}/{SubDirectoryNames.Profile}/{CommonFileNames.ProfilePicture}",
             request.File.OpenReadStream(),