Header/code audit fixes across all core scripts

Behavior fixes:
- docker_daily_restart.sh: implement RESTART_VERIFY_WAIT sleep before
  verify_running() — variable was logged as config but never applied
- cert_monitor.sh: --log now shows expiry date and days remaining for
  healthy domains in the per-domain summary; problems always show details

Header corrections:
- downloaders_reset.sh: fix frequency contradiction (15 min → 30 min)
- lidarr_cleanup.sh: Emby scan triggers on actual deletions, not every run
- ssh_setup.sh: document --local-only flag in USAGE section
- zfs_memory_snapshot.sh: clarify dry-run skips log write in PURPOSE
- ramdisk_stop.sh / ramdisk_setup.sh: document TRANSCODE_STATE_FILE var
- smart_long_test.sh: remove SMART_TEMP_WARN/CRIT — not used in code

Docker_Essentials/docker_daily_restart.sh

@@ -82,6 +82,11 @@
 #   CONTAINER_DELAY
 #       Seconds to wait after restarting a dependency before starting its dependents
 #
+#   RESTART_VERIFY_WAIT
+#       Seconds to wait after docker restart before checking the container is running.
+#       Gives the process time to initialise before verify_running samples the state.
+#       (default: 3)
+#
 # ==============================================================================================
 # RUNTIME MODES
 # ==============================================================================================
@@ -266,7 +271,7 @@ for container in "${ORDERED_RESTART[@]}"; do
                 RESTARTED+=("$container")
             else
                 if retry_docker docker restart "$container"; then
-                    # Verify container stayed running after restart
+                    [[ "${RESTART_VERIFY_WAIT:-3}" -gt 0 ]] && sleep "${RESTART_VERIFY_WAIT:-3}"
                     if verify_running "$container"; then
                         log "$ICON_STARTED $container restarted and running in $(format_duration $(( $(date +%s) - c_start ))) ✅"
                         RESTARTED+=("$container")

Docker_Essentials/downloaders_reset.sh

@@ -77,7 +77,7 @@
 #
 # Lock Acquisition
 #   acquire_lock "wait" — waits for previous run to finish since this runs every
-#   15 minutes and prior execution may still be completing.
+#   30 minutes and prior execution may still be completing.
 #
 # ==============================================================================================
 # CONFIGURATION