Use sql alchemy events to validate data

[epicadk]

Is your feature request related to a problem? Please describe.

Currently we do not validate data before sending it to the database

Describe the solution you'd like

Use the sql alchemy before insert even to validate the data being stored in the database

[epicadk]

Marking this as available because it's not really changing any functionality. But if @anitab-org/mentorship-maintainers think it's not required then will close.

[epicadk]

I'd like to work on this.