* fix: add `balance_owner` attribute for ekubo_v2 components * refactor: rename `ekubo` into `ekubo-v2` * refactor: freeze `substreams-helper` version in ekubo V2 module * docs: improve integration test comment * docs: add TODO to remove `balance_owner` in favor of `AccountBalances` --------- Co-authored-by: zizou <111426680+flopell@users.noreply.github.com>