release.yaml becomes test (once, host) -> build (matrix) over the four
cargo-zigbuild targets; each matrix job uploads its binary + .sha256 to
the shared release (idempotent create-or-get). Records the expansion in
ADR-ci-001 (2026-06-13 amendment); macOS stays deferred.
Records the CI/release pipeline as ADR-ci-001 and relocates the nix-flake
ADR from main's ADR-0049 to ADR-ci-002 (content unchanged, history note
added). Both live in docs/ci/adr/ with a README index — a dated,
ci-segmented namespace disjoint from main's integer ADR sequence, the
same split the website subproject uses to avoid cross-branch number
collisions. Drops the ADR-0049 entry from docs/adr/README.
ci-001 covers the runner model, the baked nix CI image, the clippy+test
gate, the static-musl release on tag, trigger hygiene, auth, and scope.