refactor(testenv)!: make `wait_until_electrum_sees_block` concrete
Previously `TestEnv::wait_until_electrum_sees_block` only took a `timeout`
and returned as soon as Electrum emitted any new-block notification, so it
was not clear which block was actually being waited for.
Add `block_height` and an optional `block_hash` so callers state exactly
which block Electrum must be aware of. When the notified tip has already
advanced past `block_height`, the header at that height is fetched
explicitly so the expected `block_hash` can still be verified.
Introduce `TestEnv::wait_until_electrum_tip_syncs_with_bitcoind`, a
convenience wrapper that waits until Electrum's tip matches bitcoind's
chain tip (both height and hash), and migrate all existing call sites to
it.
projects / bdk / commit