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/public/reference_data/trailer_types/models.py

@@ -1,13 +1,11 @@
-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 Column, ForeignKeyConstraint, String
 
 
-class TrailerType(Base, TenantScopedMixin):
+class TrailerType(Base, TenantScopedMixin, TimestampMixin):
     __tablename__ = "trailer_type"
     __table_args__ = (
-        ForeignKeyConstraint(["company_id"], ["a76.company.id"]),
-        ForeignKeyConstraint(["tenant_id"], ["a76.tenants.id"]),
         {"schema": "a76"},
     )