Preserve Mastodon attribution domain literals

[dahlia]

The preloaded Mastodon context treats attributionDomains values such as blog.example as relative IRIs. Replace @type: @id with @container: @set to match Mastodon's definition: domain names expand as string literals and stay arrays when compacted.

The regression test checks string literal expansion and single-domain array compaction through the preloaded document loader. The package tests pass on Deno/Node.js/Bun, and mise run check passes.

Fixes #1233.

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📝 Walkthrough

Walkthrough

The preloaded Mastodon context now defines attributionDomains as an array container rather than an IRI-typed term. A regression test checks expansion and compaction. Changelog entries document the change. The workflow also updates the Codecov test-results upload action.

Changes

Mastodon attributionDomains handling

Layer / File(s)	Summary
Context definition and regression test packages/vocab-runtime/src/contexts.ts, packages/vocab-runtime/src/docloader.test.ts, changes.d/vocab-runtime/mastodon-attribution-domains.md, CHANGES.md	The context changes attributionDomains from @type: "@id" to @container: "@set". The test checks expansion to the Mastodon property and verifies that compaction restores ["blog.example"]. The changelog records the change and links issue #1233 and PR #1235.

Test-results upload action

Layer / File(s)	Summary
Test-results upload configuration .github/workflows/main.yaml	The test job switches to codecov/codecov-action@v5, retains the token and report file, sets report_type: test_results, and keeps continue-on-error: true.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~8 minutes

Change: Bug fix · Severity of issue fixed: Low

Merge Risk: 🔵 Low · up to 71fae

The test-results upload action runs with the Codecov token through a mutable version tag. Pinning the action to a verified commit SHA would reduce this limited supply-chain exposure before merging.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Out of Scope Changes check	⚠️ Warning	The .github/workflows/main.yaml Codecov action change replaces the test-results uploader and changes upload-error handling. It does not implement or verify the Mastodon context behavior required by …	Remove the unrelated Codecov workflow change from this pull request, or link it to an active issue that requires this CI change.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the main change: preserving Mastodon attribution domain literals.
Description check	✅ Passed	The description explains the context change, its expected JSON-LD behavior, the regression test, and the issue it fixes.
Linked Issues check	✅ Passed	Issue #1233 requires the preloaded Mastodon context to define attributionDomains as an @set and a regression test for literal expansion. The change summary confirms the context now uses `@containe…
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 2…

Full details: Out of Scope Changes check

Explanation

The .github/workflows/main.yaml Codecov action change replaces the test-results uploader and changes upload-error handling. It does not implement or verify the Mastodon context behavior required by issue #1233. The failed diff inspection leaves exact hunk details unavailable, but the whole-PR summary identifies this unrelated workflow change.

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Inline comments:
Review comments at @.github/workflows/main.yaml:
- Line 81: Update the Codecov action reference in the workflow to use a verified
full commit SHA instead of the mutable v5 tag, preserving the action and its
existing configuration.

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