Implement repository pattern

The data access layer is fused with business logic and not repository pattern is enabled.
It should be added

The issue mentions implementing a repository pattern to separate data access from business logic. Start by examining the current data access layer and business logic in the codebase. Look for classes that handle database operations and see how they are intertwined with business rules. Determine what a repository interface would look like and plan the refactoring steps.

Escrito por el modelo de indexación a partir del texto del issue.