I have a form where I am uploading files to the "sites/default/files" directory. I am using the managed_file type in my form API definition. This is all working fine and I notice that in the file_managed table, I see my uploaded files with a status of 0 meaning they are temporary. I was under the impression that these files that have a status of 0 should get deleted, not only from the database, but physically from the server on cron run, but I do not see this happening. I see lots of files with a status of 0 and they are NOT in the file_usage table, so they are not being used by anything, yet if I force a cron run, I don't get errors, yet the files do not get deleted either. Am I misunderstanding how this system works?