Refactor `ChainQuery` to be more flexible #2139

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

Commits on Jun 19, 2026

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

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refactor(core,chain): extract `BlockQueries::resolve_candidates`

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refactor(core,chain): rename `TaskProgress::AwaitingQueries` to `Blocked`

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test(chain): add MTP integration test for `canonicalize_with_mtp`

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refactor(core,chain): share `median_time_past` across MTP call sites

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docs(chain): cross-reference `with_mtp` from `view_task`

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Commits on Jun 22, 2026

docs(core): fix `resolve_candidates` doc for `(payload, BlockId)` input

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Commits on Jun 23, 2026

test(core): consolidate `resolve_candidates` tests into one scenario test

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