What should an Active Record template actually look like?

Question

Design patterns

Good morning. I've thrown a scheme here, tell me, who knows how to do it right?

The first, as far as I know, is a classic approach to organizing a model from a database without any orms and templates.
The second one I came up with based on an article on design patterns (particularly Active Record).
The third I saw in a video where a man wrote his framework. ERepository is a class, where E is the name of an entity of type E1, E2 and E3. Why a repository is needed here, I don’t know, I haven’t gotten to that yet.
Please tell us how the structure of the model should look like so that it complies with all the canons of the active record.