Trigger leader balance on long-term WAL write blocking#17731
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Mark DataNode as ReadOnly(WALBlocked) when WAL write blocking persists, and let ConfigNode move Region leaders away from the blocked DataNode. Add UT and IT coverage for WAL block status and leader balance behavior.
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Mark DataNode as ReadOnly(WALBlocked) when WAL write blocking persists, and let ConfigNode move Region leaders away from the blocked DataNode. Add UT and IT coverage for WAL block status and leader balance behavior.