LDK Node v0.8 Tracking issue

[tnull]

• Follow-ups to Use BDK events in update_payment_store #658 (Follow-ups to PR #658 #770)
• Find a solution for rebroadcasting BDK wallet transactions. (Rebroadcast/bumping of on-chain wallet transactions #367)
• Track inbound payments by also unique payment IDs (Track inbound payments by also unique payment IDs #298, done in Track inbound payments by PaymentId #948)
• Recover from out-of-sync channelmonitors (Recover from out-of-sync channelmonitors #29)
• Clarify compat. guarantees after BDK update (Document compat. guarantees #74)