feat: dump state for backup

- Save custom certificates and custom routes in the backup for
  restoration.
- Save also acme.json and traefik.yaml for reference: when restored,
  they will be removed on the next backup run.

imageroot/actions/restore-module/50restore_traefik

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+#
+# Copyright (C) 2025 Nethesis S.r.l.
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+
+set -e
+
+shopt -s nullglob
+
+# Restore HTTP routes created from the UI:
+for froute in state-backup/manual_flags/* ; do
+    route=$(basename "${froute}")
+    if [[ -f "state-backup/configs/${route}.yml" ]]; then
+        cp -vfT "state-backup/configs/${route}.yml" "configs/${route}.yml"
+        touch "manual_flags/${route}"
+    fi
+done
+
+# Restore uploaded certificates (dynamic config):
+find state-backup/configs -type f -name 'cert_*.yml' -0 | \
+    xargs -0 -r -- cp -pvt configs/
+
+# Restore uploaded certificates (certificates and private keys):
+find state-backup/custom_certificates -type f -0 | \
+    xargs -0 -r -- cp -pvt custom_certificates/
+

imageroot/bin/module-cleanup-state

@@ -1,8 +1,8 @@
-#!/usr/bin/env sh
+#!/bin/bash
 
 #
-# Copyright (C) 2023 Nethesis S.r.l.
+# Copyright (C) 2025 Nethesis S.r.l.
 # SPDX-License-Identifier: GPL-3.0-or-later
 #
 
-rm -fv backup-custom-routes.json
+rm -rf state.backup

imageroot/bin/module-dump-state

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+#
+# Copyright (C) 2025 Nethesis S.r.l.
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+
+set -e
+
+rm -rf state-backup
+mkdir -vp state-backup
+
+cp -pvT traefik.yaml state-backup/
+cp -prvT configs state-backup/configs/
+cp -prvT manual_flags state-backup/manual_flags/
+cp -prvT custom_certificates state-backup/custom_certificates/
+cp -prvT acme/ state-backup/acme/

imageroot/etc/state-include.conf

@@ -0,0 +1,6 @@
+#
+# Restic include patterns for Traefik state
+# Syntax reference: https://pkg.go.dev/path/filepath#Glob
+# Restic --files-from: https://restic.readthedocs.io/en/stable/040_backup.html#including-files
+#
+state/state-backup