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/a24/fa/fa_classes/models.py

@@ -1,6 +1,6 @@
 from decimal import Decimal
 
-from api.v1.common.base_models import TenantScopedMixin
+from api.v1.common.base_models import TenantScopedMixin, TimestampMixin
 from core.database import Base
 from sqlalchemy import (
     Boolean,
@@ -13,16 +13,10 @@ from sqlalchemy import (
 from sqlalchemy.orm import Mapped, mapped_column
 
 
-class QClasses(Base, TenantScopedMixin):
+class QClasses(Base, TenantScopedMixin, TimestampMixin):
     __tablename__ = "fa_classes"  # QClases
     __table_args__ = (
         PrimaryKeyConstraint("id", name="qclases_pk"),
-        ForeignKeyConstraint(
-            ["tenant_id"], ["a76.tenants.id"], name="fk_qclasses_tenants"
-        ),
-        ForeignKeyConstraint(
-            ["company_id"], ["a76.company.id"], name="fk_qclasses_company"
-        ),
         ForeignKeyConstraint(["class_id"], ["classes.id"], name="fk_qclasses_classes"),
         {"schema": "a24"},
     )