feat: implement exchange rate filtering and validation enhancements in invoice processing

backend/core/exceptions.py

@@ -165,6 +165,7 @@ class ErrorCollector:
         self,
         field: str,
         message: str,
+        solution: Optional[List[str]],
         code: Optional[str] = None,
         value: Optional[Any] = None,
     ) -> "ErrorCollector":
@@ -184,6 +185,8 @@ class ErrorCollector:
             "field": field,
             "message": message,
         }
+        if solution:
+            error["solution"] = solution
         if code:
             error["code"] = code
         if value is not None:
@@ -199,11 +202,13 @@ class ErrorCollector:
         code: str = "INVALID",
     ) -> "ErrorCollector":
         """Atajo para agregar error de campo"""
-        return self.add_error(field, message, code)
+        return self.add_error(field, message, solution=None, code=code)
 
     def add_required_error(self, field: str) -> "ErrorCollector":
         """Atajo para agregar error de campo requerido"""
-        return self.add_error(field, f"El campo '{field}' es requerido", "REQUIRED")
+        return self.add_error(
+            field, f"El campo '{field}' es requerido", solution=None, code="REQUIRED"
+        )
 
     def add_duplicate_error(
         self,
@@ -215,7 +220,9 @@ class ErrorCollector:
         final_message = (
             message or f"El valor '{value}' ya existe para el campo '{field}'"
         )
-        return self.add_error(field, final_message, "DUPLICATE", value)
+        return self.add_error(
+            field, final_message, solution=None, code="DUPLICATE", value=value
+        )
 
     def add_invalid_format_error(
         self,
@@ -224,7 +231,10 @@ class ErrorCollector:
     ) -> "ErrorCollector":
         """Atajo para agregar error de formato inválido"""
         return self.add_error(
-            field, f"Formato inválido. Se esperaba: {expected_format}", "INVALID_FORMAT"
+            field,
+            f"Formato inválido. Se esperaba: {expected_format}",
+            solution=None,
+            code="INVALID_FORMAT",
         )
 
     def add_range_error(
@@ -243,7 +253,7 @@ class ErrorCollector:
         else:
             message = "Valor fuera de rango"
 
-        return self.add_error(field, message, "OUT_OF_RANGE")
+        return self.add_error(field, message, solution=None, code="OUT_OF_RANGE")
 
     def has_errors(self) -> bool:
         """Verifica si hay errores acumulados"""