Fix UPS notifications and add periodic battery status emails

- Fix permission denied on log files (chown nut:nut)
- Fix upssched.conf permissions (root:nut)
- Add sudo for perl to allow PVE::Notify from user nut
- Add periodic battery status emails every minute when on battery
- Add charging status emails at 5, 10, 30 min after power restore
- Remove diacritics from all notification messages
- Update documentation with sudo and permissions setup

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

proxmox/ups/scripts/ups-shutdown-cluster.sh

@@ -4,7 +4,7 @@
 # Trimite notificari email via PVE::Notify pentru fiecare pas
 #
 # Creat: 2025-10-06
-# Actualizat: 2026-01-13 - Adaugat notificari email si UPS shutdown
+# Actualizat: 2026-01-14 - Fix permisiuni log file, adaugat sudo pentru PVE::Notify
 
 LOGFILE=/var/log/ups-shutdown.log
 NODES=("10.0.20.200" "10.0.20.202")  # pve1, pveelite (pvemini va fi ultimul)
@@ -16,8 +16,22 @@ TEMPLATE_DIR="/etc/pve/notification-templates/default"
 HOSTNAME=$(hostname)
 FQDN=$(hostname -f 2>/dev/null || hostname)
 
+# Asigura ca fisierul de log exista si are permisiunile corecte
+# Scriptul poate rula ca user 'nut', deci fisierul trebuie sa fie writable
+ensure_logfile() {
+    if [ ! -f "$LOGFILE" ]; then
+        touch "$LOGFILE" 2>/dev/null || sudo touch "$LOGFILE"
+    fi
+    if [ ! -w "$LOGFILE" ]; then
+        sudo chown nut:nut "$LOGFILE" 2>/dev/null
+        sudo chmod 664 "$LOGFILE" 2>/dev/null
+    fi
+}
+
+ensure_logfile
+
 log_message() {
-    echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" | tee -a $LOGFILE
+    echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" | tee -a $LOGFILE 2>/dev/null
     logger -t ups-shutdown "$1"
 }
 
@@ -42,7 +56,7 @@ send_notification() {
 
     log_message "Sending notification: $EVENT_TITLE"
 
-    perl -I/usr/share/perl5 << EOFPERL 2>&1 | tee -a $LOGFILE
+    /usr/bin/sudo /usr/bin/perl -I/usr/share/perl5 << EOFPERL 2>&1 | tee -a $LOGFILE
 use strict;
 use warnings;
 use PVE::Notify;