RFC : Sqlalchemy models naming

[hartym]

To avoid confusion with core data objects, I want to rename all sqlalchemy specific models to make explicit the fact that it's not just data, but data with db-map related infos.

I'll use Transaction as an example but all models are subject to the same rfc.

Options :

• sqlalchemy's Transaction renamed to DbTransaction, core Transaction stay the same
• sqlalchemy's Transaction renamed to TransactionEntity, core Transaction stay the same
• sqlalchemy's Transaction renamed to MappedTransaction, core Transaction stay the same
• sqlalchemy's Transaction renamed to StoredTransaction / StorageTransaction, core Transaction stay the same (good because it's explicit that it's storage related, bad because depending on impl. it can be out of sync)
• other ?