Copyright header is missing in some files

[JAB1305]

Many files carry a copyright header at the beginning, e.g:

basyx-python-sdk/sdk/basyx/aas/adapter/json/json_deserialization.py

Lines 1 to 6 in c128a52

	# Copyright (c) 2025 the Eclipse BaSyx Authors
	#
	# This program and the accompanying materials are made available under the terms of the MIT License, available in
	# the LICENSE file of this project.
	#
	# SPDX-License-Identifier: MIT

This is missing in the following files (ignoring examples and __init__.pys):

compliance_tool/
  test/
    _test_helper.py
sdk/
  docs/
    source/
      conf.py [Configuration file, maybe not necessary]
  test/
    _helper/
      test_helpers.py
    adapter/
      test_load_directory.py
server/
  app/
    adapter/
      jsonization.py
    backend/
      local_file.py
    interfaces/
      discovery.py
      registry.py
    model/
      descriptor.py
      endpoint.py
      provider.py
      service_specification.py
    services/
      run_discovery.py
  test/
    model/
      test_provider.py

The header should be added to these files.