chore(changeset): grade @objectstack/cli minor, the level a declared clause-② requires

`Check Changeset`'s LEVEL AXIS (#16055) refuses a PR that declares clause-② YES
while grading a package whose `packages/*/src/**` it moves as `patch`. The rule
it mechanizes is the maintainer's 2026-09-04 ruling (decision batch #35, on
#15294), written out under "WHICH LEVEL" in that step: a purely additive
widening of a published package's public surface takes AT LEAST `minor`, and
the commit type may raise a bump but never lower it below what the act
requires.

This branch declares clause-② `yes` and moves `packages/cli/src/**`, so the
level and the declaration contradicted each other. Only the level moves here --
the generators, the pins and the measurements are untouched.

⚠️ The axis is invisible to the plain `--base origin/main` form of the gate,
which reports `LEVEL AXIS: NOT MEASURED` and is neither a pass nor a failure.
It is judged only from a `pull_request` event payload, off the
`needs:contract-review` carrier or a machine-spelled `Clause-②:` line, so
`--event` is the only form that can confirm this change.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01D47qPfEWVPmhguWgBZCi5N

Author: claude

.changeset/generated-migration-character-column-widths.md

@@ -1,5 +1,5 @@
 ---
-"@objectstack/cli": patch
+"@objectstack/cli": minor
 ---
 
 `os generate migration` now emits the character column `driver-sql` actually creates, in both the TypeScript and the SQL format.