add block_hash to ORDER BY

[DenisCarriere]

In case of forked blocks, need to include block_hash to prevent erasing past transactions when new block_number appears after reorg

BEFORE

PRIMARY KEY (block_date, block_number)
ORDER BY (block_date, block_number, tx_hash, tx_index, `index`)

PRIMARY KEY (block_date, block_number)
ORDER BY (block_date, block_number, ordinal)

AFTER

PRIMARY KEY (block_date, block_number)
ORDER BY (block_date, block_number, block_hash, tx_hash, tx_index, `index`)

PRIMARY KEY (block_date, block_number)
ORDER BY (block_date, block_number, block_hash, ordinal)

[DenisCarriere]

Implemented via v0.2.1