Adopt halos-docs-tools and the shared translation gate

[mairas]

Draft, and it will be red. This repository does not pass the gate yet. Opening it anyway makes the backlog visible rather than leaving it in a survey nobody reads.

The six checkers under scripts/ were copied into four documentation repositories. They now come from halos-org/docs-tools pinned at v0.1.0, and the workflow is the caller stanza for the shared reusable workflow in halos-org/shared-workflows. Unlike the advisory version it replaces, the run goes red when a translation is stale, missing, unstamped or orphaned. It does not block a merge: this repository has no branch protection and no ruleset. See the review synthesis on this PR.

What has to happen before this can merge

docs/en/tutorials/openplotter-server/index.md — 4108 words — has no translation in any of the nine locales, so the gate reports nine missing entries and exits 1. That page entered docs/en/ in 6627593, the commit that set up the translation machinery, and no locale round ever picked it up. The advisory check has been reporting it ever since and nobody acted, which is the argument for a gate that blocks.

Translate it into da de es fi fr it nb nl sv, stamp each with stamp-translation, and this goes green.

What is already verified

mkdocs build --strict is clean and check-anchors site reports all anchors resolving. The gate's only complaint is the nine missing pages, reproduced locally and identical to what CI will report.

The caller deliberately carries no paths filter. A required check that never runs on a pull request touching none of the filtered paths leaves that pull request unmergeable forever.

Same change as hatlabs/halpi2#49, hatlabs/halmet#24 and hatlabs/sh-esp32#20. Part of halos-org/halos#147.

[github-actions]

Translation status

da — 13 current, 1 missing
de — 13 current, 1 missing
es — 13 current, 1 missing
fi — 13 current, 1 missing
fr — 13 current, 1 missing
it — 13 current, 1 missing
nb — 13 current, 1 missing
nl — 13 current, 1 missing
sv — 13 current, 1 missing

Language	Page	State	Stamp to record
fi	tutorials/openplotter-server/index.md	missing	3eb95fa3d5c4e946a6ee74c23585b9b432d39c4e
fr	tutorials/openplotter-server/index.md	missing	3eb95fa3d5c4e946a6ee74c23585b9b432d39c4e
de	tutorials/openplotter-server/index.md	missing	3eb95fa3d5c4e946a6ee74c23585b9b432d39c4e
sv	tutorials/openplotter-server/index.md	missing	3eb95fa3d5c4e946a6ee74c23585b9b432d39c4e
es	tutorials/openplotter-server/index.md	missing	3eb95fa3d5c4e946a6ee74c23585b9b432d39c4e
it	tutorials/openplotter-server/index.md	missing	3eb95fa3d5c4e946a6ee74c23585b9b432d39c4e
nl	tutorials/openplotter-server/index.md	missing	3eb95fa3d5c4e946a6ee74c23585b9b432d39c4e
nb	tutorials/openplotter-server/index.md	missing	3eb95fa3d5c4e946a6ee74c23585b9b432d39c4e
da	tutorials/openplotter-server/index.md	missing	3eb95fa3d5c4e946a6ee74c23585b9b432d39c4e

[mairas]

Code review — 7 personas, run against the identical change

This PR applies the same change as hatlabs/halpi2#49, so the review ran there. Full synthesis, all 23 findings: hatlabs/halpi2#49 (comment)

Everything that applied here is fixed and pushed in this branch's fix(docs) commit:

• The documented pre-flight could not reproduce the gate — the Verifying block ran translation-status, which always exits 0, while CI runs translation-status --check.
• deploy.yml holds pages: write and id-token: write and ran plain uv sync while the gate runs uv sync --locked. With a git dependency in the graph, a pin bumped without re-locking made the two disagree.
• Deleting the obsolete "register your locale in GLOSSARIES" instructions removed the only pointer to where registration now happens. The skill says so.
• The caller stanza now states what the called workflow enforces, since the failing command lives in a repository this one does not contain.
• Smaller: "All four, every time" over a block of five; the language-selector note naming two repositories and a count of three where four carry the block.

Two decisions are still open and they are not mine to make. Both are in the halpi2 synthesis under findings 1, 3 and 4: the gate judges the whole repository while work happens one page at a time, so an English-only edit cannot go green; and no branch protection or ruleset exists on main here, so a red check does not actually block a merge. Merging today leaves the check advisory, which is the option nobody chose.