v0.9.20

Summary:

• Fixed:
  • 33fde29d reset progress when heartbeat response indicates conflict.

Detail:

Fixed:

• Fixed: 33fde29d reset progress when heartbeat response indicates conflict; by Zhang Yanpo; 2025-06-19

  With loosen-follower-log-revert enabled:

  Before this fix, RaftCore ignored conflict messages from Heartbeat RPCs,
  preventing leaders from discovering follower state changes. When a follower's
  state reverted and responded with a conflict message, the leader wouldn't
  retransmit necessary data to the follower.

  This commit ensures conflict responses are always processed properly and
  progress is reset to trigger data retransmission to the follower.