Bug fixes, arr cleanup API-driven scan, shared JS formatters

Bug fixes:
- fallback.sh: escape sed metacharacters (\ & |) in state_set values
- common.sh: parse PID from lock file content correctly (handles pid:metadata format)
- unraid_api_key_renew.sh: fix path depth (../../../) and sync registry key to conf when stale
- stop.php: only clear pid/status if process is actually dead — D-state survives SIGKILL
- array_started.sh: check ARRAY_START_SCRIPTS empty before printing launch header

Arr cleanup:
- radarr_cleanup.sh / sonarr_cleanup.sh: fetch root folders from arr API instead of
  reverse-looking up the path map — handles multi-root-folder setups correctly

UI:
- varaverk.js: extract shared formatters (_relTime, _fmtBytes, _sz, _uptime, _gb, _tb, _n)
- arrs.php / partnership.php: use shared formatters, remove duplicates
- arrs.php / fallback.php: show error message on fetch failure instead of silent empty
- docker.php: disable rename input during request, restore original value on failure
- setup.php: abort controller timeout on detect fetch
- partnership.php: remove Re-run Phase 2 button opacity dimming

Plugin/unraid/pages/setup.php

@@ -178,7 +178,9 @@ let _vvRedirect = '?tab=scheduler';
 
 // ── Detection banner ──────────────────────────────────────────────────────────
 (function() {
-  fetch('/plugins/varaverk/api/setup.php?action=detect&_=' + Date.now())
+  const _ac = new AbortController();
+  setTimeout(() => _ac.abort(), 6000);
+  fetch('/plugins/varaverk/api/setup.php?action=detect&_=' + Date.now(), {signal: _ac.signal})
     .then(r => r.json()).then(d => {
       const b = document.getElementById('vv-detect-banner');
       if (!d.ok) { b.innerHTML = '<span style="color:#555">Detection unavailable</span>'; return; }