acknowledged map grows unboundedly — confirmed/rolled-back txs are never evicted.

[scarmuega]

In @crates/core/src/mempool.rs around lines 208 - 230, The acknowledged HashMap
in apply() (mempool.write().unwrap(), acknowledged) is never pruned causing
unbounded growth; after you set tx.confirmed and call
notify(MempoolTxStage::Confirmed, ...) or notify(MempoolTxStage::RolledBack,
...) collect the corresponding TxHash keys and remove them from
state.acknowledged (e.g., gather keys in seen_txs/unseen_txs handling or call
state.acknowledged.retain to keep only non-final entries) so
confirmed/rolled-back transactions are evicted after notification; ensure you
still clone the Tx for notify before removal to avoid borrow issues.