- Introduced `getProductDiscountPercentage` method to calculate accurate discounts for users across products, categories, and global settings.
- Adjusted `importUsageLogs` to refine date modifier parameter and enhance `usage log` checks.
- Enhanced `orders_o` to include product discount logic with stricter type casting for consistency.
- Added `updateFieldsWhere` method for selective database updates based on specific conditions.
- Updated `customers_o` to handle updates for existing customers while adding new ones.