Refactor invoice schemas and services for improved clarity and structure

- Updated schemas in `schemas.py` to enhance readability by aligning field definitions and descriptions.
- Consolidated optional fields and improved default values for better data handling.
- Modified the `InvoiceService` class in `services.py` to streamline error handling and data extraction for nested invoice components.
- Ensured that nested data is processed correctly before creating invoice entries, improving overall service reliability.

backend/api/v1/modules/a76/invoices/services.py

@@ -90,19 +90,20 @@ class InvoiceService:
         errors = ErrorCollector()
 
         # Validar si la factura ya existe
-        invoice_exists(db, invoice_data.invoice_number, tenant_id, company_id, errors)                                
-        validate_create(db, invoice_data, tenant_id, company_id, errors)        
+        invoice_exists(db, invoice_data.invoice_number, tenant_id, company_id, errors)
+        validate_create(db, invoice_data, tenant_id, company_id, errors)
 
-        # Si hay errores, lanzar excepción
+        # Si hay errores, lanzar excepción ANTES de intentar crear
         errors.raise_if_errors("Error al crear la factura")
 
+        # Extract nested data
+        compliance_data = invoice_data.compliance_mx
+        financials_data = invoice_data.financials
+        logistics_data = invoice_data.logistics
+        details_data = invoice_data.details or []
+        collections_data = invoice_data.collections or []
+
         try:
-            # Extract nested data
-            compliance_data = invoice_data.compliance_mx
-            financials_data = invoice_data.financials
-            logistics_data = invoice_data.logistics or []
-            details_data = invoice_data.details or []
-            collections_data = invoice_data.collections or []
 
             # Create main invoice header
             raw_invoice_dict = invoice_data.model_dump(
@@ -148,8 +149,8 @@ class InvoiceService:
                 db.add(new_financials)
 
             # Create logistics entries
-            for logistics_item in logistics_data:
-                raw_log_dict = logistics_item.model_dump()
+            if logistics_data:
+                raw_log_dict = logistics_data.model_dump()
                 logistics_dict = clean_dict(raw_log_dict)
 
                 logistics_dict["invoice_id"] = new_invoice.id