fix: add copyright header to generate_diagrams.sh

Author: 4og

score/memory/design/shared_memory/generate_diagrams.sh

@@ -1,4 +1,16 @@
 #!/bin/bash
+# *******************************************************************************
+# Copyright (c) 2026 Contributors to the Eclipse Foundation
+#
+# See the NOTICE file(s) distributed with this work for additional
+# information regarding copyright ownership.
+#
+# This program and the accompanying materials are made available under the
+# terms of the Apache License Version 2.0 which is available at
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# SPDX-License-Identifier: Apache-2.0
+# *******************************************************************************
 set -e
 
 # Configuration