* 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`
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Co-authored-by: zizou <111426680+flopell@users.noreply.github.com>