store: drop unreachable Paged SH and the BDZ1 codec - #682
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Mode-10 scripthash heads already refuse in unpack8, so the Paged value and the walks only it used are gone. BDZ1 was a test codec; tx.head is BDZ2 and sealed SH heads are BDZ3. KIND_IDX was unused.
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Summary
ShHeadValue::Paged. Pack8 mode 2 still refuses (INDEX_REFUSE_PAGED_SH). Extent keepsappend_fks_to_pagesandcollect_page_chain_linked.BDZ1codec (BdzMphf::write_to/read_from).tx.headstays packed BDZ2. Sealed scripthash heads stay BDZ3.KIND_IDX.finalize_sh_runsdescribes the two-scan extract. A short SHAL header no longer says "run migrate".docs/personal-node-plans/is unchanged.Test plan
cargo test -p rbitcoin-store --lib -- scripthash bdz tx_head pack_udcargo clippy -p rbitcoin-store --all-targets -- -D warningscargo clippy -p rbitcoin-query --lib -- -D warnings