* Onchain scraper in `dispute-coordinator` will scrape `SCRAPED_FINALIZED_BLOCKS_COUNT` blocks before finality
The purpose is to make the availability of a `CandidateReceipt` for finalized candidates more likely.
For details see: https://github.com/paritytech/polkadot/issues/7009
* Fix off by one error
* Replace `SCRAPED_FINALIZED_BLOCKS_COUNT` with `DISPUTE_CANDIDATE_LIFETIME_AFTER_FINALIZATION`