feat(adm-009): ExceptionFilter mapping for fiscal exceptions ({error, message} unified)

src/api/SIGCM2.Api/Filters/ExceptionFilter.cs

@@ -231,6 +231,91 @@ public sealed class ExceptionFilter : IExceptionFilter
                 context.ExceptionHandled = true;
                 break;
 
+            // ADM-009: TipoDeIva fiscal exceptions
+            case PorcentajeInmutableException:
+                context.Result = new ObjectResult(new
+                {
+                    error = "inmutable_usar_nueva_version",
+                    message = "El porcentaje de un TipoDeIva es inmutable. Creá una nueva versión vía POST /iva/{id}/nueva-version."
+                })
+                {
+                    StatusCode = StatusCodes.Status409Conflict
+                };
+                context.ExceptionHandled = true;
+                break;
+
+            case AlicuotaInmutableException:
+                context.Result = new ObjectResult(new
+                {
+                    error = "inmutable_usar_nueva_version",
+                    message = "La alícuota de IngresosBrutos es inmutable. Creá una nueva versión vía POST /iibb/{id}/nueva-version."
+                })
+                {
+                    StatusCode = StatusCodes.Status409Conflict
+                };
+                context.ExceptionHandled = true;
+                break;
+
+            case PredecesorYaCerradoException predecesorYaCerradoEx:
+                context.Result = new ObjectResult(new
+                {
+                    error = "predecesora_ya_cerrada",
+                    message = predecesorYaCerradoEx.Message
+                })
+                {
+                    StatusCode = StatusCodes.Status409Conflict
+                };
+                context.ExceptionHandled = true;
+                break;
+
+            case DuplicateCodigoException duplicateCodigoEx:
+                context.Result = new ObjectResult(new
+                {
+                    error = "duplicate_codigo",
+                    message = duplicateCodigoEx.Message
+                })
+                {
+                    StatusCode = StatusCodes.Status409Conflict
+                };
+                context.ExceptionHandled = true;
+                break;
+
+            case DuplicateProvinciaException duplicateProvinciaEx:
+                context.Result = new ObjectResult(new
+                {
+                    error = "duplicate_provincia",
+                    message = duplicateProvinciaEx.Message
+                })
+                {
+                    StatusCode = StatusCodes.Status409Conflict
+                };
+                context.ExceptionHandled = true;
+                break;
+
+            case TipoDeIvaNotFoundException tipoDeIvaNotFoundEx:
+                context.Result = new ObjectResult(new
+                {
+                    error = "tipo_iva_not_found",
+                    message = tipoDeIvaNotFoundEx.Message
+                })
+                {
+                    StatusCode = StatusCodes.Status404NotFound
+                };
+                context.ExceptionHandled = true;
+                break;
+
+            case IngresosBrutosNotFoundException ingresosBrutosNotFoundEx:
+                context.Result = new ObjectResult(new
+                {
+                    error = "ingresos_brutos_not_found",
+                    message = ingresosBrutosNotFoundEx.Message
+                })
+                {
+                    StatusCode = StatusCodes.Status404NotFound
+                };
+                context.ExceptionHandled = true;
+                break;
+
             // ADM-008: PuntoDeVenta exceptions
             case PuntoDeVentaNotFoundException puntoDeVentaNotFoundEx:
                 context.Result = new ObjectResult(new
@@ -285,6 +370,21 @@ public sealed class ExceptionFilter : IExceptionFilter
                 context.ExceptionHandled = true;
                 break;
 
+            // ADM-009: vigencia_desde_invalida — domain throws ArgumentException for invalid vigencia range
+            case ArgumentException argEx when argEx.Message.Contains("vigencia_desde_invalida") ||
+                                              argEx.ParamName == "vigenciaDesde" ||
+                                              argEx.Message.Contains("debe ser posterior"):
+                context.Result = new ObjectResult(new
+                {
+                    error = "vigencia_desde_invalida",
+                    message = argEx.Message
+                })
+                {
+                    StatusCode = StatusCodes.Status400BadRequest
+                };
+                context.ExceptionHandled = true;
+                break;
+
             case ValidationException validationEx:
                 var errors = validationEx.Errors
                     .GroupBy(e => e.PropertyName)