fix: small fix and refactor after testing EkuboV2 (#188)

* 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>

substreams/Cargo.toml

@@ -14,7 +14,7 @@ members = [
     "ethereum-template-factory",
     "ethereum-template-singleton",
     "ethereum-uniswap-v4",
-    "ethereum-ekubo",
+    "ethereum-ekubo-v2",
 ]
 resolver = "2"