Core: Fix InMemoryLockManager shared scheduler shutdown#15894

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fightBoxing wants to merge 3 commits intoapache:mainfrom

fightBoxing:fix/15861-inmemory-lockmanager-shared-scheduler

Commits on Jan 30, 2026

[FLINK] Implement Iceberg lookup join functionality, and source code and junit test code.
rockyyin
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Commits on Apr 5, 2026