v1.7.4: Source de verite unique pour les services + update self-healing

setup_services.sh devient la source unique pour les services systemd
(le service rtc_save_to_db etait auparavant cree inline dans
installation_part2.sh, en doublon avec un commentaire dans save_to_db.py).

update_firmware.sh appelle maintenant setup_services.sh apres le git
pull. Resultat: les capteurs deja deployes peuvent se reparer tout
seuls au prochain update firmware (services manquants, masques, ou
nouveaux services ajoutes au repo apres l'installation initiale).

Defensif: systemctl unmask sur rtc_save_to_db avant creation du
fichier .service, pour eviter d'ecrire dans /dev/null si le service
avait ete masque (cas observe sur un capteur en production).

Pas de risque sur les capteurs sains: reecriture des .service avec
le meme contenu, comportement inchange.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

services/setup_services.sh

@@ -321,6 +321,28 @@ RemainAfterExit=yes
 WantedBy=multi-user.target
 EOL
 
+# Create service file for RTC Save to DB (long-running service, no timer)
+# Unmask first in case it was previously masked (symlink to /dev/null)
+# so the cat below writes a real file, not into /dev/null.
+systemctl unmask rtc_save_to_db.service 2>/dev/null || true
+cat > /etc/systemd/system/rtc_save_to_db.service << 'EOL'
+[Unit]
+Description=RTC Save to DB Script
+After=network.target
+
+[Service]
+ExecStart=/usr/bin/python3 /var/www/nebuleair_pro_4g/RTC/save_to_db.py
+Restart=always
+RestartSec=1
+User=root
+WorkingDirectory=/var/www/nebuleair_pro_4g
+StandardOutput=append:/var/www/nebuleair_pro_4g/logs/rtc_save_to_db.log
+StandardError=append:/var/www/nebuleair_pro_4g/logs/rtc_save_to_db_errors.log
+
+[Install]
+WantedBy=multi-user.target
+EOL
+
 # Reload systemd to recognize new services
 systemctl daemon-reload
 
@@ -342,6 +364,13 @@ systemctl enable nebuleair-cpu-power.service
 systemctl start nebuleair-cpu-power.service
 echo "Started nebuleair-cpu-power service"
 
+# Enable and start RTC Save to DB service (long-running, no timer)
+# Use restart instead of start to pick up new content if the service was
+# already running with an older version of the file.
+systemctl enable rtc_save_to_db.service
+systemctl restart rtc_save_to_db.service
+echo "Started rtc_save_to_db service"
+
 echo "Checking status of all timers..."
 systemctl list-timers | grep nebuleair