In this scenario, a pre-job and a post-job are added to the Job describes in Scenario 2: Finding duplicate files between two folders to handle files before and after the
execution of the main data Job.

As described in the above-mentioned scenario, when the main data Job is started, it
creates a temporary text file to store the fetched filenames. If the specified temporary
file already exists, it will be overwritten.

To prevent possible loss of data, the pre-job saves a backup copy of the specified
file by renaming it, if it exists, before the main Job is executed.

After the execution of the main data Job, the post-job deletes the temporary file
created by the data Job and restores the backup file, if any.