fix(models): update Company model to extend existing schema and clean up LineItem model

backend/api/v1/modules/a76/general_catalogs/company/models.py

@@ -21,7 +21,7 @@ class Company(Base, TimestampMixin):
     """Información principal de la empresa"""
     
     __tablename__ = "company"
-    __table_args__ = {"schema": "a76"}
+    __table_args__ = {"schema": "a76", "extend_existing": True}
     
     # Primary key
     id: Mapped[int] = mapped_column(Integer, primary_key=True)

backend/api/v1/modules/a76/general_catalogs/company/routes.py

@@ -11,7 +11,7 @@ from pathlib import Path
 from datetime import datetime
 
 from fastapi import APIRouter, Depends, HTTPException, status, File, UploadFile
-from fastapi.responses import FileResponse, UploadFile, File
+from fastapi.responses import FileResponse
 from sqlalchemy.orm import Session
 
 from core.database import get_core_db

backend/api/v1/modules/a76/items/line_items/models.py

@@ -26,11 +26,6 @@ class LineItem(Base, TenantScopedMixin, TimestampMixin):
 
     __tablename__ = "item_lines"
     __table_args__ = (
-        ForeignKeyConstraint(
-            ["class_code", "tenant_id", "company_id"],
-            ["a76.classes.class_code", "a76.classes.tenant_id", "a76.classes.company_id"],
-            name="fk_item_lines_class"
-        ),
         {"schema": "a76"},
     )