This PR removes `RelevantTxids` from the electrum crate and tracks transactions in a `TxGraph`. This removes the need to separately construct a `TxGraph` after a `full_scan` or `sync`.
This PR removes `RelevantTxids` from the electrum crate and tracks transactions in a `TxGraph`. This removes the need to separately construct a `TxGraph` after a `full_scan` or `sync`.