Description

The current repository factory implementation uses complex validation logic with interface checking and constructor signature validation. This can be simplified using Django's battle-tested import_string pattern, which is cleaner and more maintainable.

Motivation

• Reduce complexity: Remove ~200 lines of validation code that adds little value
• Improve performance: Add module caching to prevent redundant imports
• Better maintainability: Simpler code is easier to understand and maintain
• Follow proven patterns: Django's approach has been tested in production by millions of applications
• Cleaner error handling: Simpler exception handling without multiple validation layers

The refactoring maintains full backward compatibility while significantly simplifying the codebase.