fix code quality checks and copyright marks

Signed-off-by: leovsch leo.25.1996@gmail.com

Author: leovsch

power_grid_model_c/power_grid_model/include/power_grid_model/common/matrix_utils.hpp

@@ -1,4 +1,6 @@
 // SPDX-FileCopyrightText: Contributors to the Power Grid Model project <powergridmodel@lfenergy.org>
+//
+// SPDX-License-Identifier: MPL-2.0
 
 #pragma once
 

power_grid_model_c/power_grid_model/include/power_grid_model/component/asym_line.hpp

@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: Contributors to the Power Grid Model project <powergridmodel@lfenergy.org>
+//
+// SPDX-License-Identifier: MPL-2.0
+
 #pragma once
 
 #include <numeric>

power_grid_model_c/power_grid_model/include/power_grid_model/component/line_utils.hpp

@@ -1,4 +1,6 @@
 // SPDX-FileCopyrightText: Contributors to the Power Grid Model project <powergridmodel@lfenergy.org>
+//
+// SPDX-License-Identifier: MPL-2.0
 
 #pragma once
 

src/power_grid_model/validation/_rules.py

@@ -750,7 +750,8 @@ def all_finite(data: SingleDataset, exceptions: dict[ComponentType, list[str]] |
 def no_strict_subset_missing(data: SingleDataset, fields : list[str], component_type : ComponentType):
     """
     Helper function that generates missing value errors if a subset of the supplied fields are missing.
-    If for an instance of component type all fields are missing or all fields are not missing then no error is returned for that instance.
+    If for an instance of component type all fields are missing or all fields are not missing then,
+    no error is returned for that instance.
     In any other case an error for that id is returned.
 
     Args:
@@ -801,7 +802,8 @@ def not_all_missing(data: SingleDataset, fields : list[str], component_type : Co
             asym_axes = tuple(range(component_data.ndim, component_data[field].ndim))
             instances_with_all_nan_data = np.logical_and(instances_with_all_nan_data, np.any(np.isnan(component_data[field]) if np.isnan(nan_value) else np.equal(component_data[field], nan_value), axis=asym_axes))
 
-        ids = component_data["id"][instances_with_all_nan_data].flatten().tolist()
+        ids_data = component_data["id"][instances_with_all_nan_data]
+        ids = ids_data.flatten().tolist()
         if len(ids) > 0:
             errors.append(MultiFieldValidationError(component_type, fields, ids))
 

src/power_grid_model/validation/_validation.py

@@ -14,7 +14,6 @@
 import copy
 from collections.abc import Sized as ABCSized
 from itertools import chain
-from typing import List
 
 import numpy as np