Questions related to geotools-tibero

[TiberoClient]

I have a few questions.

• In what scenarios exactly are postCreateTable() and postDropTable() in TiberoDialect.java called?
  I tried to check the logs, but it seems they are not called during the creation of Store, Layer, or during Layer preview.
• In postCreateTable() of TiberoDialect.java, a sequence is created for each column.
  What is the role of these sequences?
• Does Mangosystem have its own complete set of test scenarios related to GeoTools? Or can TiberoTest.java cover it?
  For now, I have run GeoServer on localhost web and proceeded with the basic operations (saving Store - saving Layer - Layer preview), but I think it's hard to test all situations with the web GUI, so I'm asking.
• Currently, there is a request for GeoServer 2.18 - Tibero 7 integration, so it seems necessary to modify and distribute the geotools-tibero version 24 to the customer. There is an LGPL-2.1 license in this open-source, so I'm curious about how to discuss this matter with Mangosystem.