fix: add Redis password authentication support in health check

The health check script was not using the REDIS_HOST_PASSWORD environment
variable when checking Redis connectivity, causing failures when Redis is
password-protected. Now properly detects and uses the password from .env
when available.

Also includes minor cleanup in backup.sh (formatting and redundant log removal).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

scripts/backup.sh

@@ -233,7 +233,6 @@ log "INFO" "Génération du checksum SHA256..."
 if cd "$BACKUP_DIR" && sha256sum "$BACKUP_NAME.tar.gz" >"$BACKUP_NAME.tar.gz.sha256"; then
   cd "$PROJECT_ROOT"
   CHECKSUM=$(cut -d' ' -f1 "$BACKUP_DIR/$BACKUP_NAME.tar.gz.sha256")
-  log "INFO" "Checksum: $CHECKSUM"
 else
   cd "$PROJECT_ROOT"
   log "WARN" "Impossible de générer le checksum"

scripts/check-health.sh

@@ -152,11 +152,19 @@ echo ""
 
 # 6. Vérifier Redis
 echo "▶ Cache Redis:"
+if [ -n "${REDIS_HOST_PASSWORD:-}" ]; then
+  if docker-compose exec -T redis redis-cli -a "$REDIS_HOST_PASSWORD" ping 2>/dev/null | grep -q "PONG"; then
+    check_ok "Redis répond (avec authentification)"
+  else
+    check_fail "Redis ne répond pas ou mot de passe incorrect"
+  fi
+else
   if docker-compose exec -T redis redis-cli ping 2>/dev/null | grep -q "PONG"; then
-  check_ok "Redis répond"
+    check_ok "Redis répond (sans authentification)"
   else
     check_fail "Redis ne répond pas"
   fi
+fi
 
 echo ""