* Use ReplacingMergeTree for elements, remove element_groups and use elements_hash as a virtual "pk"
* remove unused ELEMENT_GROUP_TABLE_SQL
* merge fixes
* use redis cache to avoid writing duplicate elements to clickhouse
* move fakeredis to requirements.txt
* add team_id to cache key
* remove elements_group kafka table references
* add elements_hash to clickhouse element serializer
* fix cache key
* rename few keys
* add test runner to ease pycharm dev
* fix a some mypy errors
* remove typo
Co-authored-by: Eric <eeoneric@gmail.com>
