feat: add support session user management scripts

- Add script to create support user upon session start (`10add_support_user`).
- Add script to remove support user upon session stop (`10remove_support_user`).

These scripts handle support user creation and deletion by interacting with the database, ensuring temporary users are managed appropriately for support sessions.

imageroot/actions/support-session-started/10add_support_user

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+#
+# Copyright (C) 2024 Nethesis S.r.l.
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+
+exec 1>&2
+set -e
+
+# Check if JSON argument is provided
+if [ -z "$1" ]; then
+  echo "Error: JSON input is required as an argument."
+  exit 1
+fi
+
+# Parse JSON and set variables
+support_user=$(echo "$1" | jq -r '.support_user')
+session_id=$(echo "$1" | jq -r '.session_id')
+
+# Launch a MySQL container without mounting /var/lib/mysql and use it as a client to execute the user insert
+podman run \
+    --rm \
+    --detach \
+    --name=nethsupport_add_user \
+    --network=host \
+    --env-file=./passwords.env \
+    --env=NETHVOICE_MARIADB_PORT \
+    "${NETHVOICE_MARIADB_IMAGE}" \
+    bash -c 'mysql -u root -h 127.0.0.1 -P $NETHVOICE_MARIADB_PORT -p$MARIADB_ROOT_PASSWORD asterisk -e "
+    INSERT INTO ampusers (username, password_sha1, sections)
+    VALUES (\"'"$support_user"'\", SHA1(\"'"$session_id"'\"), \"*\")
+    ON DUPLICATE KEY UPDATE password_sha1=SHA1(\"'"$session_id"'\")"'

imageroot/actions/support-session-stopped/10remove_support_user

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+#
+# Copyright (C) 2024 Nethesis S.r.l.
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+
+exec 1>&2
+set -e
+
+# Check if JSON argument is provided
+if [ -z "$1" ]; then
+  echo "Error: JSON input is required as an argument."
+  exit 1
+fi
+
+# Parse JSON and set variables
+support_user=$(echo "$1" | jq -r '.support_user')
+
+# Launch a MySQL container without mounting /var/lib/mysql and use it as a client to execute the user delete
+podman run \
+    --rm \
+    --detach \
+    --name=nethsupport_remove_user \
+    --network=host \
+    --env-file=./passwords.env \
+    --env=NETHVOICE_MARIADB_PORT \
+    "${NETHVOICE_MARIADB_IMAGE}" \
+    bash -c 'mysql -u root -h 127.0.0.1 -P $NETHVOICE_MARIADB_PORT -p$MARIADB_ROOT_PASSWORD asterisk -e "DELETE FROM ampusers WHERE username = \"'"$support_user"'\""'
+