chore: Update licensing comments

Author: qctrlrobot

tests/__init__.py

@@ -1,3 +1,16 @@
+# Copyright 2025 Q-CTRL
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 # Copyright 2019 Q-CTRL Pty Ltd & Q-CTRL Inc
 #
 # Licensed under the Apache License, Version 2.0 (the "License");