trace-to-skill v0.1.67

Adds read-only Codex Speed/Fast preference drift diagnostics to config-audit.

Highlights:

• config-audit now reports .codex-global-state.json metadata without dumping raw state.
• Detects service_tier = "fast" or default-service-tier = "priority" mismatching a persisted global default-service-tier = null while has-user-changed-service-tier = true.
• Extends schemas/config-audit-result.schema.json with globalStatePath, globalStateExists, service-tier values, and service_tier_persistence_drift.
• Updates README, use cases, discovery docs, issue map, llms.txt, and OpenAI OSS proof docs for Codex Fast/Standard reset reports.

Validated with npm run check, git diff --check, package dry-run, scorecard, and a temp Codex home smoke test.