Current state: Done
the interface, wire protocol and storage all support 64 bits ledger id.
- however, the ledger id generation on zookeeper only generate 32 bits ledger id.
- the zookeeper-based ledger metadata store uses 2-4-4 split to store 32 bits ledger id.
- we need to find a solution to support 64 bits in zookeeper-based ledger metadata store.