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/docker_action.php

@@ -0,0 +1,21 @@
+<?php
+header('Content-Type: application/json');
+
+$action = trim($_POST['action'] ?? '');
+$name   = trim($_POST['name']   ?? '');
+
+if (!$name || !in_array($action, ['start', 'stop'], true)) {
+    echo json_encode(['ok' => false, 'error' => 'Invalid request']);
+    exit;
+}
+
+// Confirm container exists
+$check = trim(shell_exec('docker ps -a --filter ' . escapeshellarg('name=^' . $name . '$') . " --format '{{.Names}}' 2>/dev/null") ?? '');
+if ($check !== $name) {
+    echo json_encode(['ok' => false, 'error' => 'Container not found']);
+    exit;
+}
+
+exec(($action === 'start' ? 'docker start' : 'docker stop') . ' ' . escapeshellarg($name) . ' 2>&1', $out, $rc);
+
+echo json_encode(['ok' => $rc === 0, 'output' => implode("\n", $out)]);