Kintsu: KIN-H02: Malicious users can prevent other users from redeeming rewards by manipulating `total_pooled` with duplicate withdrawal requests

Kintsu's AZERO staking vault lets users request token unlocks and later batch-redeem them through send_batch_unlock_requests, which decrements the global total_pooled once per submitted batch id. The function rejects batch ids that were already unlocked but do …