Varaverk: arrange mode, folder management, rsync standalone, layout fixes

Scheduler UI:
- Arrange mode: drag scripts between orchs and reorder within arrays; right
  panel shows unassigned script pool; Save Arrangement commits to master.conf
- + Folder: named collapsible subfolders for Custom Scripts stored in schedule.json
- Rsync children: hide Run/Dry Run/Log/location when orch is ON; show standalone
  location + cron controls when orch is OFF; cron only fires when both filled
- Non-conf-managed children (transcode): toggles now show enabled when orch is on
- Right panel height sync: fix ResizeObserver feedback loop via align-self:flex-start
  on left panel and left.offsetHeight in vvFitRight
- How do I use this: updated to cover arrange, folders, rsync standalone, transcode

New API endpoints:
- board.php, clearlock.php, movescript.php, rawconf.php, readscript.php
- reorderarray.php, rsync_standalone.php, savefolders.php

run.php / dryrun.php: accept optional --location= arg for standalone rsync calls

Orchestrators/watchdog_orchestrator.sh

@@ -3,7 +3,7 @@
 # ============================ Watchdog Orchestrator ===========================================
 # ==============================================================================================
 # Runs WATCHDOG_ORCHESTRATOR_SCRIPTS in order each cron cycle.
-# Schedule: * * * * * (every minute via User Scripts plugin)
+# Schedule: */15 * * * * (every 15 minutes)
 #
 # ── EXECUTION ORDER ───────────────────────────────────────────────────────────────────────────
 #   Driven by WATCHDOG_ORCHESTRATOR_SCRIPTS in master.conf — add, remove, or reorder there.
@@ -37,7 +37,7 @@
 #   WATCHDOG_ORCHESTRATOR_HEARTBEAT_HOURS — heartbeat interval in hours
 #
 # ── USAGE ─────────────────────────────────────────────────────────────────────────────────────
-#   watchdog_orchestrator.sh           — normal run (called by cron every minute)
+#   watchdog_orchestrator.sh           — normal run (called by cron every 15 minutes)
 #   watchdog_orchestrator.sh --dry-run — pass --dry-run to all sub-scripts
 #   watchdog_orchestrator.sh --status  — show script paths and current grace state
 #   watchdog_orchestrator.sh --log     — verbose output from all sub-scripts
@@ -104,7 +104,7 @@ if [[ "$SHOW_STATUS" == true ]]; then
     done
 
     echo ""
-    echo "  Schedule:   * * * * * (every minute via User Scripts)"
+    echo "  Schedule:   */15 * * * * (every 15 minutes)"
     echo "  Heartbeat:  ${WATCHDOG_ORCHESTRATOR_HEARTBEAT:-true} / every ${WATCHDOG_ORCHESTRATOR_HEARTBEAT_HOURS:-1}hr"
     echo "━━━━━━━━━━━━━━━━━━━━━━━"
     exit 0