v0.1.0-beta.4

Prerelease of the beta line: the lazy blockquote continuation closure,
the CHANNELS table with structural both-branch census and state-locality
witness, DEFECTS.md opened with D1 (memo replay at-refold under nested
views), documentation actualisation sweep. Suite 396/0, properties
40/0, all lint gates and package smoke green, tsc gate on TypeScript 5
and 7 (nodenext).