v2.9.0 — zcode install target; config-read roster status terms

Added — zcode is a supported install target

Tracks parley-deck-cli 1.45.0. The installer gained zcode as a target (~/.zcode/skills, confirmed against the runtime bundle and against the vendor's own bundled configuration guide), bringing the target count to 15.

Changed — the roster STATUS vocabulary gained two terms

model-from-config and effort-from-config. They mark a MODEL/EFFORT cell that was read out of the agent's own configuration because its CLI exposes no flag for the value — so no parley layer can bind it and the process reads that file itself at launch.

The documented rule is unchanged: a cell must never show a parley-side declaration the argv does not carry. These terms exist so the weaker claim is never mistaken for the stronger one — such a row is never reported as ok, and roster show --explain names the file it read plus the limitation (the file can change before launch, and the CLIs do not echo the model back, so the value is not confirmable after a run).

Applies to zcode (model and effort), kimi (effort) and opencode (effort).

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Gates: npm test 387 pass / 0 fail; all six add-on manifests validate.