Contract verification fix: check only success creation tx #4717
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Resolves #4716
Motivation
When Blockscout finds a creation transaction for a contract, it doesn't check the status of the transaction but expects one result in the response. However, multiple failed transactions can presence in the DB at the same time.
Changelog
Add check of the tx status in the query for finding contract creation transaction.
Checklist for your Pull Request (PR)
CHANGELOG.md
with this PRmaster
in the Version column. Changes will be reflected in this table: https://docs.blockscout.com/for-developers/information-and-settings/env-variables.