Fixes around the delivery/build/check date handling (karen7 regtest):
- build_will (GUI + CLI) re-anchors date_to_check to the CURRENT heirs'
earliest future delivery before building, so an anticipated rebuild is no
longer blocked by the stale old-will anchor (NO_FUTURE_DATE). The checks of
the existing will keep their anchored date_to_check.
- _sync_locktime_to_built_txs now PRESERVES RELATIVE locktime/threshold
recipes ("2y"/"150d") in WILL_SETTINGS instead of freezing them to absolute
timestamps: the anchored comparisons (resolve_locktime_against_tx and
resolve_date_to_check with built_locktime) already prevent the daily
invalidate prompt. Absolute values still sync on a genuine automatic
anticipation.
- Will.remove_stale_wallet_history drops stale wallet-LOCAL will placeholders
before every (re)build in GUI and CLI so their coins are available again.
- check_willexecutors_and_heirs raises HeirNotFoundException outside the
count_heirs gate: a shortened relative recipe on a signed will now triggers
a plain rebuild ("no heirs" only when there really are none).
- is_locktime_below_threshold compares the settings on one reference frame
(resolve_guard_threshold), no longer against the built-will anchor.
Tests: purge unit + call-site, no-heirs, guard, anticipated-rebuild
end-to-end (GUI) + CLI mirror + fixed_percent_lists_amount unit,
relative-preserve sync; conftest restores electrum.constants.net after each
test (cross-file pollution guard).
