chore(changeset): grade @objectstack/cli minor under the clause-② ruling

The PM ruled clause-② `yes` on card #16600: copying this command's existing
`{ error, ... }` envelope onto a path that could not reach it is the widening
branch triage enumerated. `check-changeset-no-major`'s way 1 then applies —
the declaration is right and the level was wrong. Records why no BREAKING
banner rides with it.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YFY46JydE1gMxQG1TqBcMZ

Author: claude

.changeset/i18n-extract-check-json-compares.md

@@ -1,5 +1,5 @@
 ---
-"@objectstack/cli": patch
+"@objectstack/cli": minor
 ---
 
 `os i18n extract --check --json` now COMPARES. It used to exit 0 having compared nothing, on a tree whose bundles had provably drifted.
@@ -16,3 +16,5 @@ What each invocation now does, with no new member on any published payload:
 - **`--json` without `--check`** — unchanged in every respect.
 
 The run leaves through exactly one of those faces, so stdout still parses as exactly one JSON document.
+
+Graded `minor` rather than `patch` because the PM's clause-② ruling on this card reads the reuse of the existing envelope on a newly reachable path as a widening of the published output face; the maintainer's 2026-09-04 rule puts an already-declared widening at `minor` at least. Nothing an author can write is removed, renamed or narrowed here, and the failure prescribes no consumer code change — so no `**BREAKING**` banner and no ADR-0087 disposition ride along.