docs: mark cron scheduler tasks complete, fix outdated examples

docs/NFO_GUIDE.md

@@ -613,14 +613,15 @@ curl -X GET "http://127.0.0.1:8000/api/nfo/missing" \
 Use the scheduler API to refresh NFOs automatically:
 
 ```bash
-# Schedule weekly NFO updates
-curl -X POST "http://127.0.0.1:8000/api/scheduler/configure" \
+# Schedule weekly NFO updates (rescan runs Sunday at 03:00)
+curl -X POST "http://127.0.0.1:8000/api/scheduler/config" \
   -H "Authorization: Bearer $TOKEN" \
   -H "Content-Type: application/json" \
   -d '{
     "enabled": true,
-    "interval_minutes": 10080,
-    "task": "update_nfo_files"
+    "schedule_time": "03:00",
+    "schedule_days": ["sun"],
+    "auto_download_after_rescan": false
   }'
 ```