add numeric

add numeric

resolve graphprotocol#5200

resolve graphprotocol#5200

add support for numerics

graph: Speed up lookups in RowGroup by memoizing last entry for each id

WIP: Memoize indirect_weight

chain/ethereum: Change how we parallelize eth calls

The DecoderHook now relies on EthereumAdapter's contract_calls method. With
that, cached call results are looked up with one query from the store. Call
results that are not cached are retrieved with eth_calls made in parallel
to the ethereum node.

chain/ethereum: Change how we parallelize eth calls

The DecoderHook now relies on EthereumAdapter's contract_calls method. With
that, cached call results are looked up with one query from the store. Call
results that are not cached are retrieved with eth_calls made in parallel
to the ethereum node.

adapt code for diesel2 library