WebHost: move atexit saving to end of room hosting function

MultiServer.py

@@ -508,7 +508,7 @@ def init_save(self, enabled: bool = True):
                 self.logger.exception(e)
             self._start_async_saving()
 
-    def _start_async_saving(self):
+    def _start_async_saving(self, atexit_save: bool = True):
         if not self.auto_saver_thread:
             def save_regularly():
                 # time.time() is platform dependent, so using the expensive datetime method instead
@@ -532,8 +532,9 @@ def get_datetime_second():
             self.auto_saver_thread = threading.Thread(target=save_regularly, daemon=True)
             self.auto_saver_thread.start()
 
-            import atexit
-            atexit.register(self._save, True)  # make sure we save on exit too
+            if atexit_save:
+                import atexit
+                atexit.register(self._save, True)  # make sure we save on exit too
 
     def get_save(self) -> dict:
         self.recheck_hints()

WebHostLib/customserver.py

@@ -142,7 +142,7 @@ def init_save(self, enabled: bool = True):
             savegame_data = Room.get(id=self.room_id).multisave
             if savegame_data:
                 self.set_save(restricted_loads(Room.get(id=self.room_id).multisave))
-            self._start_async_saving()
+            self._start_async_saving(atexit_save=False)
         threading.Thread(target=self.listen_to_db_commands, daemon=True).start()
 
     @db_session
@@ -278,6 +278,7 @@ async def start_room(room_id):
                 raise
             finally:
                 try:
+                    ctx._save()
                     with (db_session):
                         # ensure the Room does not spin up again on its own, minute of safety buffer
                         room = Room.get(id=room_id)