Refactor `ChainQuery` to be more flexible #2139

Draft

evanlinjin wants to merge 6 commits into

bitcoindevkit:masterfrom

evanlinjin:refactor/sans-io-mtp-chain-query

Commits on Jun 19, 2026

refactor(core,chain)!: redesign `ChainQuery` to sans-io `ChainTask`

evanlinjin
and
claude
committed
refactor(core,chain): extract `BlockQueries::resolve_candidates`

evanlinjin
and
claude
committed
refactor(core,chain): rename `TaskProgress::AwaitingQueries` to `Blocked`

evanlinjin
and
claude
committed
test(chain): add MTP integration test for `canonicalize_with_mtp`

evanlinjin
and
claude
committed
refactor(core,chain): share `median_time_past` across MTP call sites

evanlinjin
and
claude
committed
docs(chain): cross-reference `with_mtp` from `view_task`

evanlinjin
and
claude
committed