chore(release): 0.33.0

[astrapi69]

Summary

Release 0.33.0:

• engine#205 (fix(rules): isSlugId counts characters, as the schema does (#205) #221): isSlugId counts characters (code points), as the schema does.
• engine#185 follow-up and engine#182 (feat(quality): a bridge lesson has no exercise-type minimum either; schema 1.18 (#185, #182) #222): purpose: "bridge" lifts the exercise-type minimum too. Schema 1.18 is description-only: what bridge lifts, plus two line breaks restored.
• engine#190 (feat(validate): language tags and set metadata are engine rules (#190) #223): language tags as E-LANG-TAG / W-LANG-TAG-CANONICAL (via Intl), plus W-LANG-PAIR-SAME, W-SET-TITLE-NATIVE and W-CARD-BACK-SCRIPT. validateLesson gains options.sourceLanguage.

Measured over the ten content repositories: 0 findings for every new rule.

Docs audit

I checked every doc for the release's changes: the new ids, purpose/bridge semantics, the language-tag claims, isSlugId and length units, schema version claims (1.18), package version, counts and sizes.

Doc	Result
README.md	#222: schema v1.18. No new export; validateLesson's new option is documented in validation.md.
CONTRIBUTING.md	Checked, nothing affected.
CHANGELOG.md	This PR: the dated 0.33.0 section. The entries came with #221, #222 and #223.
docs/lesson-format.md	#221: slug length unit and the file-name byte limit. #222: quality-minimum table, bridge bullet, catalog row, version-counter note. #223: new "Language tags" section, catalog rows, params rows.
docs/validation.md	#223: Layer 2 row, the lint list with sourceLanguage, /rules size (27.3 kB, re-measured).
docs/architecture.md	#221: the slug-id move is decided. #223: engine side of #190 done, dropped severities, the open item, /rules size. This PR: the backend table, where a language-code shape is now a rule both apply in different shapes and no longer "none".
docs/concepts.md	#222: the 1.18 note and version claim.
docs/comparative-analysis.md	#222: schema 1.18. This PR: package 0.33.0 in three places and the re-measured test count (1,655).
docs/schema-diagrams.md	Regenerated in #222.
docs/getting-started.md, authoring-patterns.md, extensions.md, qti.md	Checked, nothing affected.
docs/blog/*.md + docs/blog/de/*.md	#222: version claims in six files, and the bridge note in schema-first-content-engineering, both languages. Checked for claims about the template's language rules; none present.
docs/proposals/*.md	Checked, nothing affected.
In-code docs	Docstrings on language-rules.ts, isSlugId, SLUG_ID_MAX_LENGTH, validateLesson/validateLessonRules (the new option) and quality.ts; the schema description of purpose; the quality-rules.json _comment. npm run docs:api:check passes.

Downstream (re-pin wave, not part of this PR)

• Content repos: they mirror schema 1.18 (description-only), quality-rules.json and grading-presets.json (version and comment). No content change is needed: 0 findings.
• Template:
  • drops validate_set_meta and back_looks_like_source;
  • passes each set's source_language to validateLesson in validate_with_engine.mjs;
  • from 0.31.0: calls validateLessonQuality;
  • from 0.32.0: drops the duplicate-id audit.
• alc-books: the seven bridge lessons declare purpose: "bridge", and its own quality copy goes.
• alc-traffic-knowledge: 05-rettungsgasse-einsatzfahrzeuge declares purpose: "quiz".
• App:
  • the share check follows the engine's tag rule and quality minimums;
  • the backend's language-code shape (zh-Hant-TW rejected) is replaced;
  • the backend lacks the exercise-id check (from 0.32.0).

Gates

make release-check, make prose-check, npm run docs:api:check and scripts/check-bundle-size.mjs all pass (core 87.2 of 90 kB gzip, qti 54.6 of 60 kB).

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