(v4) Database sharding

[i-norden]

In order to shard our database we need to

• Denormalize tables by block_number, so that we can partition tables by block range: denormalize tables by block_number #51
• Script for creating new partition(s) on shard server
• Script for linking partition(s) with postgres_fdw on the aggregating server
• Stored procedures for state and storage snapshot generation
• Need to work out additional details/scripts for how to manage the automatic creation and linking of partitions as our database syncs new blocks at head
• Update go-ethereum to work with v4 schema: update sql indexer to use new v4 schema go-ethereum#211
• Update eth-statediff-service to work with v4 schema

Notes:
Basic research and more details around the sharding approach/design can be found here
This is a child issue of https://github.com/vulcanize/ops/issues/137

[i-norden]

Closing this as the remaining tasks need to be considered in the context of TimescaleDB