issue: #45865
- Modified leader_checker.go to include all nodes (RO + RW) instead of
only RW nodes, preventing channel balance from stucking on RO nodes
- Added debug logging in segment_checker.go when no shard leader found
- Enhanced target_observer.go with detailed logging for delegator check
failures to improve debugging visibility
- Fixed integration tests:
- Temporarily disabled partial result counter assertion in
partial_result_on_node_down_test.go pending concurrent issue fix
- Increased transfer channel timeout from 10s to 20s in
manual_rolling_upgrade_test.go to avoid flaky test caused by target
update interval (10s)
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Signed-off-by: Wei Liu <wei.liu@zilliz.com>