Mempool Policy Changes

- Transactions with version number set to 3 are now treated as standard on all networks (#29496),

subject to Opt-in Topologically Restricted Until Confirmation (TRUC) Transactions policy as

described in [BIP 431](https://github.com/bitcoin/bips/blob/master/bip-0431.mediawiki). The

policy includes limits on spending unconfirmed outputs (#28948), eviction of a previous descendant

if a more incentive-compatible one is submitted (#29306), and a maximum transaction size of 10,000vB

(#29873). These restrictions simplify the assessment of incentive compatibility of accepting or

replacing TRUC transactions, thus ensuring any replacements are more profitable for the node and

making fee-bumping more reliable.