Improve Robustness of Inbound MPP Claims Across Restart#1434

Merged

valentinewallace merged 9 commits intolightningdevkit:mainfrom

TheBlueMatt:2022-04-robust-payment-claims

May 30, 2022

Commits on May 19, 2022

Enable removal of `OnionPayload::Invoice::_legacy_hop_data` later
TheBlueMatt
committed
Store an `events::PaymentPurpose` with each claimable payment
TheBlueMatt
committed

Commits on May 26, 2022

Ensure all HTLCs for a claimed payment are claimed on startup
TheBlueMatt
committed