Reset stale status texts on session load and stop

- normalizeSessionStatuses: reset all queued items to "Wartet" instead of
  only checking a few specific patterns (missed Retry, Unrestrict-Fehler etc.)
- Reset completed items with stale extraction status to "Fertig (size)"
- stop(): reset all non-finished items to queued/"Wartet" and packages to queued

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "real-debrid-downloader",
-  "version": "1.5.38",
+  "version": "1.5.39",
   "description": "Real-Debrid Downloader Desktop (Electron + React + TypeScript)",
   "main": "build/main/main/main.js",
   "author": "Sucukdeluxe",