Ldk-Server Milestone 3

[G8XSU]

• Support storing Forwarding payments in ldk-node/ldk-server. (Moved from Milestone-2)
  • Start publishing PaymentForwarded events. ldk-node#404
  • Add interface for PaginatedKVStore. #22
  • Add Sqlite based PaginatedKVStore impl. #23
  • Start storing forwarded payments in ldk-server (ldk-node release required) (Add Api impl for ListForwardedPayments. #32)
  • ListForwardedPayments API proto and impl. (Add Api impl for ListForwardedPayments. #32)
• /getNodeBalances Add implementation for GetBalances Api. #26
• Config support Add file based Config support. #28
• Log facade ? (Blocked on ldk-node changes and release, prioritized for later.) (Add configurable logging system ldk-node#407)
• Dockerize (not needed if we don't use postgres i think, since it can be run using just cargo run)

[tnull]

Log facade ?

Likely blocked on lightningdevkit/ldk-node#309