Observability: Parse event names in eth_getLogs and eth_subscribe

[dinhani-cw]

In eth_getLogs and eth_subscribe operations, we can parse the friendly name of the event being queried or subscribed based on the list of Solidity compiled events.

We should do that and use these names in tracing and metrics.

The additional challenge here is that there can be no events or multiple events in these RPC methods. Initially we could track only the first event if present.