Use `BestBlock` for chain state serialization (and somewhat parallelize init)#4266

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TheBlueMatt wants to merge 16 commits intolightningdevkit:mainfrom

TheBlueMatt:2025-10-reorg-blocksource-swap

Commits on Jan 27, 2026

Update BestBlock to store ANTI_REORG_DELAY * 2 recent block hashes
TheBlueMatt
committed
f add claude's bestblock test
TheBlueMatt
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f use hard-coded values to break constant changes leading to ser break
TheBlueMatt
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Return `BestBlock` when deserializing chain-synced structs
TheBlueMatt
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Replace `Cache::block_disconnected` with `blocks_disconnected`

Matt Corallo
authored and
TheBlueMatt
committed
Pass a `BestBlock` to `init::synchronize_listeners`

Matt Corallo
authored and
TheBlueMatt
committed
Make the `Cache` trait priv, just use `UnboundedCache` publicly
TheBlueMatt
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Make `UnboundedCache` bounded
TheBlueMatt
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f correct cache retention on reorg
TheBlueMatt
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f correct + constify header cache limit
TheBlueMatt
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Consolidate all the pub aync utils to `native_async`
TheBlueMatt
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Add `async_poll.rs` to `lightning-block-sync`
TheBlueMatt
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Fetch blocks from source in parallel during initial sync
TheBlueMatt
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Silence "elided lifetime has a name" warnings in no-std locking
TheBlueMatt
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Use the header cache across listeners during initial disconnect
TheBlueMatt
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Include recent blocks in the `synchronize_listeners`-returned cache

Matt Corallo
authored and
TheBlueMatt
committed