chore: spdx license identifier for bash scripts

Signed-off-by: Dario Tranchitella <dario@tranchitella.eu>

Author: prometherion

scripts/backup.sh

@@ -1,5 +1,8 @@
 #!/bin/bash
 
+# Copyright 2025 Clastix Labs
+# SPDX-License-Identifier: Apache-2.0
+
 # Enable debugging, exit on errors, and ensure the script fails if any command in a pipeline fails
 if [ "${DEBUG}" = 1 ]; then
     set -x

scripts/certs-renew.sh

@@ -1,5 +1,8 @@
 #!/bin/bash
 
+# Copyright 2025 Clastix Labs
+# SPDX-License-Identifier: Apache-2.0
+
 # Enable debugging, exit on errors, and ensure the script fails if any command in a pipeline fails
 if [ "${DEBUG}" = 1 ]; then
     set -x

scripts/defrag.sh

@@ -1,5 +1,8 @@
 #!/bin/bash
 
+# Copyright 2025 Clastix Labs
+# SPDX-License-Identifier: Apache-2.0
+
 # Enable debugging, exit on errors, and ensure the script fails if any command in a pipeline fails
 if [ "${DEBUG}" = 1 ]; then
     set -x

scripts/etcd-client.sh

@@ -1,5 +1,8 @@
 #!/bin/bash
 
+# Copyright 2025 Clastix Labs
+# SPDX-License-Identifier: Apache-2.0
+
 # Script to create an etcd pod for inspecting the etcd cluster
 
 # Default values

scripts/restore.sh

@@ -1,5 +1,8 @@
 #!/bin/bash
 
+# Copyright 2025 Clastix Labs
+# SPDX-License-Identifier: Apache-2.0
+
 # Enable debugging, exit on errors, and ensure the script fails if any command in a pipeline fails
 if [ "${DEBUG}" = 1 ]; then
     set -x

scripts/schedule.sh

@@ -1,5 +1,8 @@
 #!/bin/bash
 
+# Copyright 2025 Clastix Labs
+# SPDX-License-Identifier: Apache-2.0
+
 # Enable debugging, exit on errors, and ensure the script fails if any command in a pipeline fails
 if [ "${DEBUG}" = 1 ]; then
     set -x