Prevent HTLC double-forwards, prune forwarded onions#4303

valentinewallace wants to merge 11 commits intolightningdevkit:mainlightningdevkit/rust-lightning:mainfrom

valentinewallace:2025-12-reconstruct-fwds-followup-2valentinewallace/rust-lightning:2025-12-reconstruct-fwds-followup-2Copy head branch name to clipboard