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

Media/lidarr_missing_art.sh

@@ -133,7 +133,7 @@ fi
 
 # ── Temp dir for subshell fetch/fail counters ─────────────────────────────────────────────────
 LIDARR_TMP=$(mktemp -d)
-trap 'rm -rf "$LIDARR_TMP"' EXIT
+trap '_release_all_locks; rm -rf "$LIDARR_TMP"' EXIT
 touch "$LIDARR_TMP/album_fetches" "$LIDARR_TMP/album_fails" \
       "$LIDARR_TMP/artist_fetches" "$LIDARR_TMP/artist_fails"