Documentation update for "file_completed_action => delete" action not checking for a success/fail status

[crisdarocha]

The option file_completed_action => delete doesn't check if the ingestion was successful or not before deleting the input file.

It would be good if the documentation could state this behaviour clearly, preventing data loss for the users.

Thanks a lot!

[crisdarocha]

@guyboertje and @karenzone this issues comes from our previous discussion, but I couldn't set the documentation label to it, or have it assigned to you.