fix: add header with copyright, author, license in benchmark_executor.py

Author: iraedeus

pysatl_cpd/benchmark/benchmark_executor.py

@@ -7,6 +7,10 @@
 configurations.
 """
 
+__author__ = "Danil Totmyanin"
+__copyright__ = "Copyright (c) 2026 PySATL project"
+__license__ = "SPDX-License-Identifier: MIT"
+
 import csv
 import hashlib
 import itertools