Move remainder container updates from weekly to monthly

Daily updates daily containers, weekly updates its sync-window containers,
monthly now handles everything else via MONTHLY_MAINTENANCE_SCRIPTS.

Docker_Essentials/docker_update.sh

@@ -93,7 +93,7 @@
 #       Enable or disable normal mode. docker_daily_restart.sh runs regardless.
 #       (default: true)
 #
-#   WEEKLY_REMAINING_UPDATES
+#   MONTHLY_REMAINING_UPDATES
 #       Enable or disable remainder mode. (default: true)
 #
 #   PROFILE_CRITICAL_CONTAINER_NAMES[emby|critical-data]
@@ -117,7 +117,7 @@
 # docker_update.sh --remainder
 #     Remainder mode — pull all running containers not in managed lists,
 #     restart those that received updates, prune dangling images
-#     Called by weekly_sync_maintenance.sh at the end of the Sunday window
+#     Called by monthly_maintenance.sh
 #
 # docker_update.sh --dry-run
 #     Preview which containers would be pulled without making changes
@@ -170,8 +170,8 @@ detect_hosts
 # ━━━ Container Discovery ━━━
 # ==============================================================================================
 if [[ "$REMAINDER_MODE" == true ]]; then
-    if [[ "${WEEKLY_REMAINING_UPDATES:-true}" != "true" ]]; then
-        echo "WEEKLY_REMAINING_UPDATES=false — skipping remainder container updates"
+    if [[ "${MONTHLY_REMAINING_UPDATES:-true}" != "true" ]]; then
+        echo "MONTHLY_REMAINING_UPDATES=false — skipping remainder container updates"
         exit 0
     fi