Oracle LOB Cleanup

[pauldaustin]

Oracle LOB storage isn't necessarily being cleaned up.

https://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:9534250100346425432
https://www.oracle.com/technical-resources/articles/database/sql-11g-securefiles.html
https://tanelpoder.com/2012/04/22/where-is-lob-data-stored/
https://docs.oracle.com/cd/B28359_01/appdev.111/b28393/adlob_smart.htm#i1006363