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Integración de funcionalidad de Descargo PEPS con reportes de Packing List y Aviso Consolidado:
- Frontend: Agregados imports de dischargeReportsApi y ClipboardList
- Frontend: Agregada función handleDownloadDescargo con cálculo PEPS
- Frontend: Agregado botón condicional de Descargo PEPS (solo exportaciones)
- Frontend: Integradas funciones de Aviso Consolidado y Packing List
- Backend: Agregados routers y tasks de descargo y otros reportes
- Backend: Configurado Celery con todas las tareas de reportes
- Backend: Corregido ForeignKey en line_quantities.package_id
- Resueltos conflictos manteniendo funcionalidades de ambas ramas
- Updated import statements for TariffFraction to reflect new module structure in reports related to importacion (mex, temporary, facturas).
- Adjusted import paths for USTariffFraction in service files to maintain consistency across modules.
- Implemented methods to get all, get by ID, create, update, and delete US tariff fractions.
- Added filtering capabilities for retrieving tariff fractions.
- Included error handling for duplicate entries during creation.
- Consolidated item creation and update validation into a common function to reduce code duplication.
- Updated the `validate_create` and `validate_update` functions to utilize the new common validation logic.
- Introduced a new `common_validators.py` file for shared validation functions.
- Added a new `fractions.py` file to handle fraction-related logic and searches.
- Enhanced the `LineCustom` model to use an enumeration for `fraction_type`.
- Improved the `ItemService` class with methods for locking invoices and renumbering line items.
- Updated the `Sector` model to use a boolean type for the `authorized` field.
- Fixed import issues in the router by replacing the old `a24_router` with `sitar_router`.
