- **Core API**: Introduced `IDataTransformer` interface and `BaseDataTransformer` abstract class.
- **Data Services**: Updated `BaseRemoteDataServices` and `DataServicesConfig` to support optional transformer injection. CRUD methods now auto-transform data mapping (DTO <-> Entity) when a transformer is provided.
- **Generics**: Updated `CommonRemoteDataServices` to forward the `TDTO` generic for strict type safety. Fixed `ApiResponse<T>` casting and excess property type checks.
- **Showcase/Samples**: Created `BookingTransformer` (snake_case to camelCase mapping) and injected it into `booking.data-services.ts`.
- **Advanced Showcase**: Added `AdvancedBookingTransformer` and `AdvancedBookingService` to demonstrate extending base transformers with custom methods (e.g., `getAvailabilityChart`).
- **Documentation**: Added comprehensive developer guide at `apps/docs-dev/src/packages/core-api/transformers.md`.
- **Testing**: Added 16 new unit tests for transformer integrations (identity and mock scenarios).
Note: The implementation is 100% backward compatible. All 49/49 tests pass and the TypeScript typecheck is entirely clean.
Firman Ramdhani
1c2090f4fb