- mix.exs: @version 0.1.0 -> 0.2.0
- README.md: the install pin goes to ~> 0.2
- CHANGELOG.md: assembles the 0.2.0 section from the one fragment
- changelog.d/sd-7zl.md: the promoted fragment deleted

MINOR under 0.x, not a patch: the release carries a narrowing of the
read check. An optional record field no longer covers a required shape
field, so a read a document used to satisfy now answers `{:missing,
[name]}`. The ADR-0001 amendment that rules it stands at proposed; the
flip is its own request.

The section is dated 2026-09-06, the local date on the machine cutting
the prep, per the convention release.md records. The fragment's bullet
is carried over byte for byte, and the lead paragraph is the only prose
written at release time.

Cut, not published: the tag, the GitHub release and the Hex publish are
the operator's.

Refs: sd-d7e