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

Transcodes/ramdisk_setup.sh

@@ -78,12 +78,16 @@
 #   TRANSCODE_CHMOD / TRANSCODE_OWNER
 #       Permissions applied to both ramdisk and SSD directories. (default: 755 / nobody:users)
 #
+#   TRANSCODE_STATE_FILE
+#       Override state file path. (default: ${STATE_DIR}/transcode_state.db)
+#
 # ==============================================================================================
 # STATE FILES
 # ==============================================================================================
 #
-#   /tmp/transcode_state.db    — current symlink target + flip count tracking
-#                                Lives in /tmp (ephemeral — resets on reboot correctly)
+#   TRANSCODE_STATE_FILE (default: ${STATE_DIR}/transcode_state.db)
+#       Current symlink target + flip count tracking. Lives in STATE_DIR
+#       (ephemeral on Unraid — resets on reboot correctly).
 #
 # ==============================================================================================
 # RUNTIME MODES