feat: Implement general catalogs for INPC, Legends, Multi-Currency Types, Packages, Ports, Prevalidators, Signatures, Unit Conversions, and Units of Measure

- Added INPC management page with search functionality.
- Created Legends management page with filters for code and description.
- Implemented Multi-Currency Types management with search capabilities.
- Developed Packages management page with filtering options.
- Introduced Ports management page with authentication and data fetching.
- Added Prevalidators management page with search filters.
- Implemented Signatures management page with search by name and position.
- Created Unit Conversions management page for conversion factors.
- Developed Units of Measure management pages for ACE, American, and OMA with data tables and create/edit dialogs.

backend/core/database.py

@@ -4,15 +4,19 @@ Configuración de base de datos con soporte multi-tenant
 - Bases de datos dedicadas para clientes enterprise
 """
 
+import logging
 from contextlib import contextmanager
 from typing import AsyncGenerator, Dict, Generator, Optional
 
 from sqlalchemy import create_engine
+from sqlalchemy.exc import ProgrammingError
 from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
 from sqlalchemy.orm import Session, declarative_base, sessionmaker
 
 from .config import settings
 
+logger = logging.getLogger(__name__)
+
 # Base declarativa para modelos ORM
 Base = declarative_base()
 
@@ -25,7 +29,8 @@ core_engine = create_engine(
     echo=False,
 )
 
-CoreSessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=core_engine)
+CoreSessionLocal = sessionmaker(
+    autocommit=False, autoflush=False, bind=core_engine)
 
 # Engine asíncrono para operaciones async
 async_core_engine = create_async_engine(
@@ -106,7 +111,8 @@ def get_tenant_db(
     else:
         # Tenant con BD dedicada
         engine = get_tenant_engine(tenant_id, db_config)
-        SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+        SessionLocal = sessionmaker(
+            autocommit=False, autoflush=False, bind=engine)
         db = SessionLocal()
 
     try:
@@ -119,7 +125,15 @@ def init_db():
     """
     Inicializa las tablas de la base de datos core
     """
-    Base.metadata.create_all(bind=core_engine)
+    try:
+        Base.metadata.create_all(bind=core_engine, checkfirst=True)
+    except ProgrammingError as e:
+        # Si la tabla ya existe, es seguro continuar
+        if "already exists" in str(e):
+            logger.warning(
+                f"Algunas tablas ya existen en la base de datos: {e}")
+        else:
+            raise
 
 
 async def init_async_db():