The changelog still described unreleased work under 1.1.0, which was already
published with its own notes. Those notes are restored verbatim for history,
and the new work has its own 1.2.0 section that the feed publisher will turn
into release notes.
The release guide, infrastructure map, and mobile SSOT now carry the 1.2.0
identity, state that installer binaries are distributed through the feed and
never committed, and record that the published 1.1.0 installer is unsigned and
is being superseded rather than rewritten. Backlog entries cover the remaining
external signing and token secrets.
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