test: cover schema_audit.rs's MAX_AUDIT_NAMES truncation, close issue #627

[t0k0sh1]

Summary

Closes #627 (issue #537 audit series item 8, the closing PR).

MAX_AUDIT_NAMES (100) caps each of SchemaAudit's three name-list sections (untyped_concepts, undeclared_types, unknown_labels) — total reports the true count, names a name-ordered (BTreeSet) prefix. None of the three had a test past the cap. Each gets a 101-name batch (one past the cap):

• untyped_concepts: 101 distinct untyped objects off a typed subject.
• undeclared_types: 101 distinct asserted-but-undeclared schema:type objects.
• unknown_labels: 101 distinct relation labels under a closed_labels: true schema.

Each asserts total == 101, names.len() == 100, and that the 101st (lexicographically/numerically highest, via zero-padding) name is the one excluded.

Scoped out (already documented in this issue's plan before implementation began): reserved_alias_conflicts. Alias registration only works before a schema is installed, but the audit itself requires one — and PUT /schema's own migration-boundary guard (ADR 0009 §6.3 guard 2) already refuses to install over a pre-existing conflicting alias. Two guards close off every public-API path to a non-empty section.

Closes out the 4-PR series for #627: #667 (resolve.rs), #668 (promote.rs), #669 (communities.rs/recall.rs), this one (schema_audit.rs).

Test plan

• cargo fmt
• cargo clippy --all-targets --locked -- -D warnings
• cargo nextest run --locked (555 http_api tests passed)
• cargo test --doc --locked
• Diff-scoped mutation gate: test-only diff, No mutants to filter

https://claude.ai/code/session_0198T2iKZ17g3tt2bdNq1ju8

Summary by CodeRabbit

• 改善
  • 監査結果の名前一覧が100件を超える場合、総件数を維持しつつ、名前順で先頭100件のみ表示されるよう動作を確認しました。
  • 未宣言型、未知ラベル、未型付け概念の各一覧に対応しています。
  • クローズドラベルを有効にした場合の未知ラベル一覧も検証しています。

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📝 Walkthrough

Walkthrough

スキーマ監査の3種類の名前リストに101件の入力を追加しました。各テストは、totalが全件数を保持し、namesが名前順の100件に制限されることを検証します。unknown_labelsではclosed_labelsも有効にします。

Changes

スキーマ監査の名前リスト切り詰め検証

Layer / File(s)	Summary
監査結果の名前リスト上限テスト tests/http_api/schema_audit.rs	untyped_concepts、undeclared_types、unknown_labelsが101件ある場合に、totalが101件となり、namesから101件目が除外されることを検証します。unknown_labelsではclosed_labels有効時の動作も検証します。

Estimated code review effort: 2 (Simple) | ~10 minutes

Merge Risk: 🔵 Low · up to c66cb

The PR only adds schema-audit truncation tests and does not change production behavior. The tests do not fully verify the returned names and their order, so an ordering regression could pass; the PR is otherwise mergeable with this bounded test-strengthening follow-up.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Linked Issues check	⚠️ Warning	PRは [#627] の schema.rs の3セクションを検証しますが、reserved_alias_conflicts と他モジュールの未検証分岐を実装していません。	未対応の要求を追加実装するか、schema.rs の3セクションだけを対象とする子Issueへ分割してリンクしてください。

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	タイトルは、MAX_AUDIT_NAMES の切り詰め動作を検証するテスト追加という主変更を明確に示しています。
Out of Scope Changes check	✅ Passed	変更は [#627] の schema.rs 監査結果に対する切り詰めテストに限定され、目的外のコード変更はありません。
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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Inline comments:
In `@tests/http_api/schema_audit.rs`:
- Around line 520-533: Update the schema audit assertions for each capped name
collection to build the complete expected sequence from 000 through 099 and
compare the entire names array with assert_eq!, preserving the prefixes 個人, 型,
and 未知 for their respective tests. Replace the partial length and contains
checks so both membership and ordering are validated.

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• tests/http_api/schema_audit.rs