Migrating to sql-alchemy 2.0 - Better typing support in the ORM

[VannTen]

Problem statement

Better typing is better code

High-level Goals

In so many words, fully typed ORM support (see 2.0 Features

Additional context

We also in storages (see graph/ in particular ) a lot of code which replicates sql-alchemy methods. This is the occasion to get rid of those.

Acceptance Criteria

• [ ] Full migration to sqlalchemy 2.0 in storages and the of users of storages.

[KPostOffice]

Migration guide

[codificat]

/sig stack-guidance /kind cleanup

[Gkrumbach07]

Add graph-ql support too? Possible library we could use