chore(contracts): add a way to fetch operator info in BoltManager

[merklefruit]

Right now BoltManager has a private EnumerableMap of operators registered, however there is no way to fetch the data (e.g. the RPC address) of a specific operator address).

This can be circumvented by querying the rpc from a proposer status for one of the pubkeys associated with that authorized operator, however in the next iteration let's improve this for readibility