Add partition-level idle detection to prevent message loss on ownership transfer#39

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Copilot wants to merge 9 commits intomasterfrom

copilot/add-partition-idle-detection

Commits on Jan 15, 2026

Initial plan
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Add PartitionConsumerIdleDetector and integrate into ConsumerImpl

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Add comprehensive unit tests for PartitionConsumerIdleDetector

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Address code review feedback: fix NPE, ClassCastException, and extract magic numbers

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Fix LookupTopicResult constructor calls and improve initial delay for idle detection

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Improve code quality: extract cleanup method, add exception handling, improve test reliability

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Remove enablePartitionOwnershipCheck and eliminate null checks with no-op detector pattern

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Add race condition handling between broker notification and idle detector reconnect

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Fix potential NPE by always initializing lastActivityTimestamp

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nodece
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