chore(v2): raft module refactoring #3699
Merged
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The change moves raft component to a separate package
metastore/raftnode
,RaftNodeService
is refactored as well. In addition, the state reader abstraction should prevent any confusion mentioned in #3502.The change also fixes the way FSM is initialized: now that we explicitly separate read-only and write transaction, the state should be initialized explicitly as well.