feat: Implement general catalogs for ports, unit conversions, and units of measure

- Added models, DTOs, services, and routes for ports, including CRUD operations.
- Introduced unit conversions with corresponding models, DTOs, services, and routes.
- Developed units of measure with detailed models, DTOs, services, and routes for various types.
- Ensured all new features are integrated with FastAPI and SQLAlchemy for seamless database interactions.

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

@@ -20,6 +20,7 @@ from sqlalchemy.orm import Mapped, mapped_column, relationship
 if TYPE_CHECKING:
     from api.v1.modules.a76.parts.models import Part
     from api.v1.modules.public.reference_data.material_types.models import MaterialType
+    from api.v1.modules.a76.general_catalogs.units_of_measure.models import UnitOfMeasure
 
 
 class Class(Base, TenantScopedMixin, TimestampMixin):
@@ -30,12 +31,6 @@ class Class(Base, TenantScopedMixin, TimestampMixin):
     __tablename__ = "classes"
     __table_args__ = (
         PrimaryKeyConstraint("id", name="classes_pkey"),
-        ForeignKeyConstraint(
-            ["tenant_id"], ["a76.tenants.id"], name="fk_classes_tenant"
-        ),
-        ForeignKeyConstraint(
-            ["company_id"], ["a76.company.id"], name="fk_classes_company"
-        ),
         ForeignKeyConstraint(
             ["client_id"], ["a76.clients_and_providers.id"], name="fk_classes_client"
         ),
@@ -60,15 +55,17 @@ class Class(Base, TenantScopedMixin, TimestampMixin):
     class_code: Mapped[str] = mapped_column(String(8))  # CLASE
 
     # Basic information
-    description_es: Mapped[Optional[str]] = mapped_column(String(500))  # DESCRIPCIONE
-    description_en: Mapped[Optional[str]] = mapped_column(String(500))  # DESCRIPCIONI
+    description_es: Mapped[Optional[str]] = mapped_column(
+        String(500))  # DESCRIPCIONE
+    description_en: Mapped[Optional[str]] = mapped_column(
+        String(500))  # DESCRIPCIONI
 
     # Material and measurement
     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)
+        String(5), ForeignKey("a76.units_of_measure.code")
     )  # UNIMED - homologated from UNIMEDIDA
 
     # Tariff fractions
@@ -79,7 +76,8 @@ class Class(Base, TenantScopedMixin, TimestampMixin):
 
     # Additional classification
     sub_key: Mapped[Optional[str]] = mapped_column(String(5))  # CLAVESUB
-    physical_review: Mapped[Optional[int]] = mapped_column(SmallInteger)  # REVFISICA
+    physical_review: Mapped[Optional[int]] = mapped_column(
+        SmallInteger)  # REVFISICA
     iva_exempt_fraction: Mapped[Optional[str]] = mapped_column(
         String(4)
     )  # FRACCIONEXENTAIVA
@@ -88,6 +86,9 @@ class Class(Base, TenantScopedMixin, TimestampMixin):
     material_type: Mapped[Optional["MaterialType"]] = relationship(
         foreign_keys=[material_key]
     )
+    unit_of_measure_info: Mapped[Optional["UnitOfMeasure"]] = relationship(
+        foreign_keys=[unit_of_measure]
+    )
 
     # Inverse relationship with GParts that have this class
     parts: Mapped[list["Part"]] = relationship(