Add header with copyright and SPDX licensing information

decoder.py

@@ -1,3 +1,7 @@
+# File: decoder.py
+# Copyright (C) 2026 Erick Ahmed
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
 import argparse
 import polars as pl
 

main.py

@@ -0,0 +1,3 @@
+# File: main.py
+# Copyright (C) 2026 Erick Ahmed
+# SPDX-License-Identifier: AGPL-3.0-or-later

parser.py

@@ -1,3 +1,7 @@
+# File: parser.py
+# Copyright (C) 2026 Erick Ahmed
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
 import re
 import csv
 import polars as pl

stat/frequency.py

@@ -1,3 +1,7 @@
+# File: frequency.py
+# Copyright (C) 2026 Erick Ahmed
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
 import argparse
 import json
 from pathlib import Path