docs(releases): describe the in-tree Console release flow; drop the deleted objectui pin procedure (#26029)

<!-- claude-projects-attribution: {"github_login":"os-elon-musk"} -->
_Requested by **Elon** · [project
thread](https://claude.ai/code/project/chan_01WedDzV26nniwxv7jC88B9D?thread=cmsg_01WedDzV26nniwxv7jC88B9D92ykJ9hN1nxRBvkJbs7bzh)_

Fixes #26021

Clause-②: no
Metadata-protocol: none

## What changes

`docs/releases-maintenance.md` only (+~73 / −~225). #25745 deleted
`.objectui-sha`, `scripts/bump-objectui.sh` (+ selftest),
`scripts/objectui-changeset-digest.mjs`, `scripts/objectui-range.mjs`
and `scripts/build-console.sh`, but the release runbook still described
them as the live procedure. Every sentence that depended on the pin was
rewritten or removed, not only the ~25 lines the card counted:

- **Intro and layer diagram:** the fixed group holds both
`@objectstack/*` and `@object-ui/*`; ui/ PRs write ordinary root
changesets; `ui/**/CHANGELOG.md` joins the generated detail layer. The
`objectui bump → .changeset/console-*.md` row is gone.
- **"The frontend is a package too":** replaces the bump-script usage,
"the pin must be a commit on objectui main" and the unreadable-pin
refusal with today's flow: `pnpm console:build` →
`@objectstack/console#build:dist` → `packages/console/build-dist.sh`
(copies `ui/apps/console/dist`, ships the tracked `sdui.manifest.json`,
single-zod canary). Notes that the pre-merge `ui/.changeset/` files wait
on #25831.
- **Manifest regeneration:** rewritten for the in-tree producer (`node
scripts/gen-sdui-manifest-node.mjs` builds `ui/packages/` registry;
`check-sdui-manifest.mjs` recomputes the source digest), per #25712.
`pnpm objectui:build` / `objectui:refresh` are gone.
- **Sourcing the Console section:** from the `@object-ui/*` changelogs
`changeset version` writes, not `objectui-range.mjs`.
- **"Which objectui revision we pin is a decision":** replaced by a
short "No objectui pin" paragraph linking #25711/#25745/#25697/#10134
instead of retelling the history.
- **Cutting a release:** the table's `objectui pin` row becomes
`Console` (built from `ui/apps/console` at the snapshot / version
commit); cut-rc steps 1–2 now match `cut-rc.yml` (`pnpm run build` then
`pnpm run console:build`); the "On the pin" paragraph and the GA
pin-freshness aside are removed. The rc.6 pin-chasing paragraph stays,
as history in the past tense.

Out of scope, per the card: `.claude/skills/**`, workflow comments,
`docs/qa/platform-checklist/areas/*.json`, `docs/audits/**`.
`docs/adr/0082` still names the deleted scripts in its historical
addendum; left as written.

## Gates

`node scripts/pm/dispatch-gates.mjs --commands` on this diff derives 13
commands; all 13 exit 0 on `0f5c90ab` (after `pnpm install` and `turbo
run build --filter=@objectstack/formula --filter=@objectstack/lint` for
the doc-formula gate's prerequisite):

`check-ci-filter-parity`, `check-closing-keyword-parity` (+
`--self-test`), `check-comment-mask-corpus`,
`check:doc-formula-expressions`, `check:cross-package-test-inputs`,
`check:doc-authoring`, `check:driver-memory-census`,
`check:gitlink-declared`, `check:nul-bytes`, `check:refd-timer-probe`,
`check:required-contexts` (reads this page scan-only; `Console Pin Gate`
stays past tense), `check:watch-hint-literal`.

Readers of this page's text: `scripts/pm/release-rehearsal-clone.mjs
--self-test` (C10 asserts the page names the script) passes. No test
quotes the deleted prose.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

https://claude.ai/code/session_01DpQiiNz96hbwQVmyGCrmZh

Co-authored-by: Claude <noreply@anthropic.com>

Author: objectstack-fleet[bot]