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>

installation_part2.sh

@@ -72,13 +72,10 @@ imsi_number=$(echo "$imsi_output" | grep -oP '^\d{15}$' || echo "N/A")
 #info "Connect SARA R4 to network"
 #python3 /var/www/nebuleair_pro_4g/SARA/sara_connectNetwork.py ttyAMA2 20810 60
 
-#Need to create the two service
-# 1. start the scripts to set-up the services
-# 2. rtc_save_to_db
-
-#1. set-up the services (SARA, NPM, BME280, etc)
+# Set up all systemd services (SARA, NPM, BME280, RTC save_to_db, etc.)
+# Single source of truth: services/setup_services.sh
 info "Setting up systemd services..."
-    
+
 if [[ -f "$REPO_DIR/services/setup_services.sh" ]]; then
     sudo chmod +x "$REPO_DIR/services/setup_services.sh"
     sudo "$REPO_DIR/services/setup_services.sh" || warning "Failed to set up systemd services"
@@ -87,43 +84,6 @@ else
     warning "Systemd services setup script not found."
 fi
 
-#2. Add rtc_save_to_db.service
-SERVICE_FILE_2="/etc/systemd/system/rtc_save_to_db.service"
-info "Setting up systemd service for rtc_save_to_db..."
-
-# Create the systemd service file (overwrite if necessary)
-sudo bash -c "cat > $SERVICE_FILE_2" <<EOF
-[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
-EOF
-
-success "Systemd service file created: $SERVICE_FILE_2"
-
-# Reload systemd to recognize the new service
-info "Reloading systemd daemon..."
-sudo systemctl daemon-reload
-
-# Enable the service to start on boot
-info "Enabling the service to start on boot..."
-sudo systemctl enable rtc_save_to_db.service
-
-# Start the service immediately
-info "Starting the service..."
-sudo systemctl start rtc_save_to_db.service
-
 # Display device information
 echo ""
 echo "=========================================="