- Updated schemas in `schemas.py` to enhance readability by aligning field definitions and descriptions.
- Consolidated optional fields and improved default values for better data handling.
- Modified the `InvoiceService` class in `services.py` to streamline error handling and data extraction for nested invoice components.
- Ensured that nested data is processed correctly before creating invoice entries, improving overall service reliability.
- Added InvoiceHeader, InvoiceComplianceMx, InvoiceFinancials, InvoiceLogistics, InvoiceSalesDetails, and InvoiceCollections models.
- Created schemas for invoice operations including create, update, and response schemas.
- Developed services for handling business logic related to invoices, including retrieval, creation, updating, and deletion of invoices and their related data.
- Introduced routes for invoice management, enabling CRUD operations through a RESTful API.
- Integrated invoice routes into the main application router.
- Removed unused routers from the core module to streamline the API structure.
