chore: release v2.4.0

[cipherbox-release-bot]

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2.4.0

2.4.0 (2026-09-19)

Features

• engine: admit a write target below a proved grafted write root (#1910) (bc49321)
• engine: hold a child the grantee published in a grafted base (#1904) (d1f05ee)

Bug Fixes

• engine: act on the Greptile findings that landed after five merges (#1905) (801ea55)
• engine: cache what the write wave adopts before its floor moves (#1914) (8d449b3)
• engine: read a file under the scope it sits in (#1912) (00e24aa)
• engine: run the sweep as an idle job and admit a grafted version restore (#1917) (f4d6aa9)
• engine: vouch a vault root read cut at the vault pointer (#1919) (f2fe158)
• wasm: fail the web floor store closed on a value it cannot read (#1907) (b4ffb2f)

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