v1.0.1 — pv.youtube service preflight + sidecar runtime revert

Two fixes after a 2026-05-23 regression where a Kodi restart left
plugin.video.youtube's service.py un-started, breaking every delegated
play with a silent "Service IPC - Monitor has not started" error.

- Addon: probe pv.youtube's localhost httpd (50152/50153) before
  delegating. If nothing is listening, show a "YouTube service down —
  restart Kodi" notification and fall back to our DASH / progressive
  paths instead of letting setResolvedUrl fail silently.

- Sidecar: revert tokio runtime from current_thread back to
  multi_thread with 2 worker threads so subscriptions_feed's per-channel
  tokio::spawn fan-out runs in parallel. The current_thread RSS savings
  weren't worth the behavioral change.

addon/plugin.video.torttube/addon.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
 <addon id="plugin.video.torttube"
        name="torttube"
-       version="1.0.0"
+       version="1.0.1"
        provider-name="Sulkta">
   <requires>
     <import addon="xbmc.python" version="3.0.0"/>