Refactor models and services in A76 module

- Updated GBultoService to use models.Package instead of models.GBulto.
- Refactored Part model to use SQLAlchemy 2.0 style with Mapped and mapped_column.
- Added timestamps (created_at, updated_at, deleted_at) to various pedimento models.
- Improved relationships and foreign key constraints in pedimento models.
- Updated PermissionRuleOct and Seal models to use Mapped and mapped_column.
- Changed DTO configuration from orm_mode to from_attributes for better compatibility.
- Removed obsolete models (models.py and models_ped.py) from the repository.

backend/api/v1/modules/a76/classes/models.py

@@ -1,14 +1,10 @@
 """
 Modelos ORM para gestión de clases SCAII y SCAF
 """
-from sqlalchemy import Column, Integer, String, DateTime, Boolean, Text, Numeric, SmallInteger, ForeignKey
-from sqlalchemy.sql import func
-from sqlalchemy.orm import relationship
+from typing import TYPE_CHECKING, Optional
+from sqlalchemy import Integer, String, SmallInteger, ForeignKey, PrimaryKeyConstraint, ForeignKeyConstraint, UniqueConstraint
+from sqlalchemy.orm import Mapped, mapped_column, relationship
 from core.database import Base
-import enum
-
-# Importar modelos relacionados para type hints y relationships
-from typing import TYPE_CHECKING, List, Optional
 
 if TYPE_CHECKING:
     from api.v1.modules.a76.parts.models import Part
@@ -20,42 +16,51 @@ class Class(Base):
     Modelo para la tabla GClases - Información de clases en sistemas SCAII y SCAF
     """
     __tablename__ = "classes"
-    __table_args__ = {"schema": "a76"}
+    __table_args__ = (
+        PrimaryKeyConstraint('id', name='classes_pkey'),
+        UniqueConstraint('client_key', 'class_code', name='uq_classes_client_key_class_code'),
+        ForeignKeyConstraint(['tenant_id'], ['a76.tenants.id'], name='fk_classes_tenant'),
+        ForeignKeyConstraint(['material_key'], ['public.material_types.key'], name='fk_classes_material_type'),
+        {"schema": "a76"}
+    )    
     
-    # Primary key compuesta
-    client_key = Column(Integer, primary_key=True, nullable=False)
-    class_code = Column(String(8), primary_key=True, nullable=False)
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    
+    # Unique constraint compuesta
+    client_key: Mapped[int] = mapped_column()
+    class_code: Mapped[str] = mapped_column(String(8))
+    
+    tenant_id: Mapped[int] = mapped_column(Integer, nullable=False, index=True)
     
     # Basic information
-    description_spanish = Column(String(500), nullable=True)
-    description_english = Column(String(500), nullable=True)
+    description_es: Mapped[Optional[str]] = mapped_column(String(500))
+    description_en: Mapped[Optional[str]] = mapped_column(String(500))
     
     # Material and measurement
-    material_key = Column(String(10), ForeignKey('public.material_types.key'), nullable=True)  # CLAVEMAT - homologated from TIPOMAT/TIPOMATEQUIPO
-    unit_of_measure = Column(String(5), nullable=True)  # UNIMED - homologated from UNIMEDIDA
+    material_key: Mapped[Optional[str]] = mapped_column(String(10), ForeignKey('public.material_types.key'))  # CLAVEMAT - homologated from TIPOMAT/TIPOMATEQUIPO
+    unit_of_measure: Mapped[Optional[str]] = mapped_column(String(5))  # UNIMED - homologated from UNIMEDIDA
     
     # Tariff fractions
-    fraction = Column(String(10), nullable=True)  # Mexican tariff fraction
-    us_fraction = Column(String(16), nullable=True)  # FRACCIONAME - US tariff fraction
+    fraction: Mapped[Optional[str]] = mapped_column(String(10))  # Mexican tariff fraction
+    us_fraction: Mapped[Optional[str]] = mapped_column(String(16))  # FRACCIONAME - US tariff fraction
     
     # Additional classification
-    sub_key = Column(String(5), nullable=True)  # CLAVESUB
-    physical_review = Column(SmallInteger, nullable=True)  # REVFISICA
-    iva_exempt_fraction = Column(String(4), nullable=True)  # FRACCIONEXENTAIVA
+    sub_key: Mapped[Optional[str]] = mapped_column(String(5))  # CLAVESUB
+    physical_review: Mapped[Optional[int]] = mapped_column(SmallInteger)  # REVFISICA
+    iva_exempt_fraction: Mapped[Optional[str]] = mapped_column(String(4))  # FRACCIONEXENTAIVA
     
     # Relationships
-    material_type = relationship("MaterialType", foreign_keys=[material_key])
+    material_type: Mapped[Optional["MaterialType"]] = relationship(foreign_keys=[material_key])
     
     # Inverse relationship with GParts that have this class
-    parts = relationship(
-        "Part",
+    parts: Mapped[list["Part"]] = relationship(
         primaryjoin="and_(Class.client_key == Part.client_key, Class.class_code == Part.part_class)",
         foreign_keys="[Part.client_key, Part.part_class]",
         viewonly=True,
         back_populates="part_class_info"
     )
     
-    def __repr__(self):
-        return f"<Class(client_key={self.client_key}, class_code='{self.class_code}', description='{self.description_spanish}')>"
+    def __repr__(self) -> str:
+        return f"<Class(client_key={self.client_key}, class_code='{self.class_code}', description='{self.description_es}')>"