Get Kelp Effective Balances

Get all effective rsETH balances for a specific block number for a given number of addresses.

Here is the flow of rsETH:
1. Users deposit rsETH into one of several bridges (ARB, ETH)
2. This rsETH is minted to a single contract on the Derive chain
3. A socket bridge hook deposits this rsETH into a Derive Vault which mints shares
4. Those shares are bridged back to the source chain in the form of rsETH-C

To calculate the effective rsETH balances that users have in our vaults, we need to:
1. total_deposits: the total amount of rsETH deposited by users across all chains
2. user_shares: count how many rsETH-C shares are held across chains
3. Filter out users that have not registered with the orderbook
4. effective_balance: user_shares / total_shares * total_deposits

If no addresses are provided, returns all effective balances for all addresses.
NOTE: only users who have registered via derive.xyz are elligible to be tracked.
NOTE: This route cannot be tested locally