Creatio File API and MinIO storage: how to set correct Content-Type/MIME for uploaded files?

Hello everyone

We are integrating Creatio File management API with MinIO (S3-compatible object storage). The files are successfully uploaded to MinIO, but the object metadata in MinIO has an incorrect Content-Type (it ends up as text/plain). This becomes a real issue in the browser - when opening the direct MinIO object URL, the browser does not render images (PNG) because MinIO returns:
Content-Type: text/plain
X-Content-Type-Options: nosniff

What we do in Creatio:

IFileFactory fileFactory = UserConnection.GetFileFactory();
var fileLocator = new EntityFileLocator("PromotionFile", imageId);
IFile file = fileFactory.Create(fileLocator);
file.Name = fileName;
file.SetAttribute("PromotionId", promotionId);
file.Save();
fileStream.Position = 0;
file.Write(fileStream, FileWriteOptions.SinglePart);

Expected behavior
When uploading a PNG (or any file), MinIO should store and return the correct Content-Type (e.g. image/png) so that direct browser access works.

Actual behavior
The uploaded object in MinIO still has wrong Content-Type (text/plain), as if Creatio ignores the file extension.

Questions
Does Creatio File API support setting the Content-Type for the underlying storage object especially for MinIO?