Hivemind is able to only show last 50 log lines generated by the sql queries

There is a limit to the number of log lines generated by a single query execution by SqlAlchemy. Hivemind can output only 50 last log lines generated by the query, including lines with a severity lower than the limit set on loggers. During attaching/detaching contexts HAF generates dozens of notices because of creating triggers etc..., but only 50 last of them are visible in the log. It makes problems with using automatic logging on context changes (haf!553 (merged)) because crucial logs about stage changes are discarded