Varaverk: FallBack + Watchdog tabs; plugin path restructure to Plugin/unraid/

- FallBack tab: per-node tier inventory + active fallback card with duration, tier, handback strikes, running container status
- Watchdog tab: live system health (RAM bar + thresholds, load, uptime, daemon), docker watchdog strikes + skip list + restart history, stability strikes + reboot log, resource pressure alert card, config inventory (mem limits, required, pause/stop lists)
- Swapped partnership/arrs tab order; FallBack between partnership and watchdog
- Plugin source tree moved from Plugin/usr/local/emhttp/plugins/varaverk/ to Plugin/unraid/
- Deployment/ conf templates added

Plugin/unraid/api/rsync_standalone.php

@@ -0,0 +1,47 @@
+<?php
+// Save rsync standalone config (location + cron) for a specific rsync tier.
+// POST: flag_name (e.g. "DAILY_RSYNC_ENABLED"), orch_id, location, cron
+// Stored in schedule.json under "__rsync_{FLAG_NAME}".
+// Triggers a cron rebuild so the standalone entry takes effect immediately.
+header('Content-Type: application/json');
+require_once dirname(__DIR__) . '/include/config.php';
+require_once dirname(__DIR__) . '/include/scheduler.php';
+
+if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
+    echo json_encode(['ok' => false, 'error' => 'POST only']);
+    exit;
+}
+
+$flagName = trim($_POST['flag_name'] ?? '');
+$orchId   = trim($_POST['orch_id']   ?? '');
+$location = trim($_POST['location']  ?? '');
+$cron     = trim($_POST['cron']      ?? '');
+
+if (!$flagName || !preg_match('/^[A-Z_]+_RSYNC_ENABLED$/', $flagName)) {
+    echo json_encode(['ok' => false, 'error' => 'Invalid flag_name']);
+    exit;
+}
+if ($orchId && (str_contains($orchId, '..') || !preg_match('/^[A-Za-z0-9_.\-\/]+\.sh$/', $orchId))) {
+    echo json_encode(['ok' => false, 'error' => 'Invalid orch_id']);
+    exit;
+}
+if ($location && (!str_starts_with($location, '/') || str_contains($location, '..') || preg_match('/[\x00\n\r]/', $location))) {
+    echo json_encode(['ok' => false, 'error' => 'Invalid location']);
+    exit;
+}
+
+$key      = '__rsync_' . $flagName;
+$schedule = vv_schedule_load();
+$schedule[$key] = [
+    'flag_name' => $flagName,
+    'orch_id'   => $orchId,
+    'location'  => $location,
+    'cron'      => $cron,
+];
+if (!vv_schedule_save($schedule)) {
+    echo json_encode(['ok' => false, 'error' => 'Write failed']);
+    exit;
+}
+
+vv_cron_rebuild($schedule);
+echo json_encode(['ok' => true]);