fix: preserve update observations for stopped LXC guests

AppImage/scripts/lxc_update_finalization.py

@@ -0,0 +1,11 @@
+"""One process-wide LXC completion state, independent of Flask import name.
+
+AppRun executes flask_server as __main__, while collectors import it as
+flask_server. Both completion paths must share this canonical module so
+the terminal hook and compatibility HTTP callback cannot consume a run twice.
+No guest actions, registry writes or background tasks occur on import.
+"""
+import threading
+
+lock = threading.RLock()
+runs: dict[tuple[int, str], dict] = {}