[fix](fe) Fix deadlock risks in ConcurrentLong2*HashMap#62117

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dataroaring:fix/concurrent-map-deadlock-safety

Commits on Apr 3, 2026

[fix](fe) Fix deadlock risks in ConcurrentLong2ObjectHashMap and ConcurrentLong2LongHashMap

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Commits on Apr 4, 2026

[fix](fe) Address review comments on concurrent map deadlock fix

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claude
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Commits on Apr 7, 2026

[fix](fe) Guard read methods in callback to prevent cross-segment deadlock

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