feat(0044-amend): optional failure title, lifted into the index — v0.1.4

[siddhant573]

Summary

Adds an optional title to failure records (amending decision 0044) — a short defect-style name for the failure, typically the investigation verdict's bug title. Triage queues and dashboards need a label, not just a status: rca.root_cause is a sentence, title is a name.

• Step record (failure.schema.json): optional top-level title — type: string, minLength: 1. Open string, never cross-checked. No new required fields, no new diagnostic codes.
• Index lift (finalize): FailureRow gains title?; lifted verbatim when the record's title is a non-empty string — the same mirror-never-validate posture as the triage_status lift. Absent/empty/non-string → omitted from the row (no title: null noise). Sort and totals unchanged.
• Index schema (failure-index.schema.json): documents the optional title row property.
• Validator: no new checks — title is not part of the row/path-agreement cross-check, and a record-vs-row mismatch is impossible on a freshly finalized pack since finalize generates the index.
• Docs: amendment note in 0044-failure-records.md; design/contract/04-L1.md Failures section shows title at both levels.
• Release: version → 0.1.4 + CHANGELOG entry. Purely additive — records without a title index exactly as before.

Test plan

• TDD: 3 new tests written first (red), then implementation (green)
  • finalize lifts title verbatim; omits when absent/empty/non-string; titleless records index fine
  • step schema accepts title, rejects empty
  • index schema accepts a lifted title row property, rejects empty
• fixtures/0.1/L1/valid/failure-full carries the title at both levels — conformance passes in directory and sealed-zip forms, no other fixture changed
• npx vitest run — 130/130 · npx tsc --noEmit clean

After merge: cut GitHub Release 0.1.4 (tag must match package.json) — the release workflow publishes @testmuai/evidence-cli@0.1.4 to npm; kane-cli can then bump to ^0.1.4.

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