Add AvailableBalances::next_splice_out_maximum_sat#4550

TheBlueMatt merged 6 commits into

lightningdevkit:mainlightningdevkit/rust-lightning:mainfrom

tankyleo:2026-04-next-splice-out-maximumtankyleo/rust-lightning:2026-04-next-splice-out-maximumCopy head branch name to clipboard