Update project documentation to reflect the completion of Phase 0 and Phase 1, and the commencement of Phase 2. This includes archiving obsolete documents, updating the README with a new architectural overview, and refining the project checklist and status reports.
- Archive obsolete PRD and Roadmap documents
- Update `IFNEX_Phase0_Checklist.md` with completed tasks and Phase 2 roadmap
- Update `STATUS.md` with recent development progress for August 2026
- Refactor `04_Laravel/README.md` to include detailed technical specifications and architecture diagrams
- Update root `README.md` with updated versioning and system architecture visualization
- Refine `PriceCalculatorServiceTest.php` to align with updated service output structures
Refactor the pricing calculation service and shipping rate import logic to improve consistency and reliability. This includes updating direction naming conventions, enhancing model casting, and adding comprehensive test suites.
- Update `ShippingRatesImport` to use 'outbound' and 'inbound' instead of 'export' and 'import'
- Refactor `PriceCalculatorService` to use a more modular calculation structure
- Update `ShippingRate` model to use explicit property casting for zones
- Add `HasFactory` trait to `Country` and `ShippingRate` models
- Add new database factories for `Country` and `ShippingRate`
- Implement new feature tests for API endpoints and service logic
- Add new service tests for `PriceCalculatorService`
