fix: Add FINAL to CH stats query

Want to make sure all stats are up to date even if parts aren't merged yet.

platform_plugin_aspects/management/commands/monitor_load_test_tracking.py

@@ -215,6 +215,7 @@ def get_clickhouse_stats(self):
                 max(emission_time) as most_recent,
                 date_diff('second', max(emission_time), now()) as lag_seconds
             FROM {self.ch_xapi_table}
+            FINAL
             FORMAT JSON
         """