Ensure table contains all fields

It is common to use if not table exist create table in beginning of main.

#1 It is a little redundent, would like to have a single purpose function ensureTable
#2 when delivering an update, it is sometimes breaking code with existing tables, that need to be manually created.

I would suggest to make a function that can ensure to its best the table is ready for the current class.

I remeber this feature from the suneido project https://suneido.com/ had a function ensure, I couldn't find the docs right now