Shovel Can Now Index Multiple Chains

[ryandotsmith]

This is useful if you want to index Mainnet, Bedrock, and Base into a single Postgres database using a single E2PG process.

Concurrent chain indexing is accomplished by Shovel's (fka E2PG) new task model. A single Shovel daemon can run concurrent tasks. In addition to indexing multiple chains, tasks can be used when you want to add a new integration to an existing Shovel installation. This allows you to easily keep your primary indexing operations running while the new integration is being backfilled.

For more information, see Shove's README.

Task status can be monitored via the web ui: https://localhost:8546

The Block API is available for 2 chains at the moment:

Chain	ID	URL
Mainnet	1	https://1.rlps.indexsupply.net
Bedrock	10	https://10.rlps.indexsupply.net