scheduler will not crash or be corrupted if you write content to the folder while it's uploading. In practice,
_it is possible_ that concurrency issues happen for heavy-loaded apps. In this case, we advice to use the
`scheduler.lock` lock to ensure thread-safety. The lock is blocked only when the scheduler scans the folder for
changes, not when it uploads data. You can safely assume that it will not affect the user experience on your Space.