Fix progressive disclosure violations and amend DoD/Self-Audit for document deliverables

[klappy]

Three canon documents from the Anti-Cache Lying work violated every tier of
the Writing Canon progressive disclosure requirements (no blockquotes, no
Summary sections, generic headers). This commit rewrites all three with proper
progressive disclosure, documents the incident, and closes the structural gap
that allowed it:

• Replace odd/constraint/anti-cache-lying.md with blockquote, Summary, descriptive headers
• Replace docs/incidents/oddkit-stale-cache-2026-02.md with full progressive disclosure
• Replace docs/oddkit/IMPL-content-addressed-caching.md with full progressive disclosure
• Create docs/incidents/progressive-disclosure-failure-2026-02.md (incident record)
• Amend canon/constraints/definition-of-done.md: add Document Deliverables section,
  Operating Constraint for Writing Canon validation, "The document exists" failure mode
• Amend canon/methods/self-audit.md: add 5b Document Structure Check, update Outline
  and Description to reflect ten areas
• Create docs/oddkit/IMPL-writing-canon-gate.md (OddKit enforcement implementation plan)

https://claude.ai/code/session_01RNhBecvpHv3hXHVQGej8hY

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Note

Low Risk
Documentation-only changes; main risk is unintended policy/enforcement expectations changing how work is declared “done,” not runtime behavior.

Overview
Reframes document writing quality as an enforceable deliverable: the Definition of Done now requires validating document outputs against the Writing Canon progressive-disclosure checklist, and the Self-Audit adds a dedicated document-structure validation step.

Adds an incidents registry (docs/incidents/README.md) and a new incident report (docs/incidents/progressive-disclosure-failure-2026-02.md) to document why the enforcement exists, plus refreshes related incident/implementation docs (including odd/constraint/anti-cache-lying.md and docs/oddkit/IMPL-content-addressed-caching.md) to comply with progressive disclosure.

Introduces docs/oddkit/IMPL-writing-canon-gate.md describing a future OddKit preflight/validate gate for checking blockquotes, summary sections, and header scan quality on document deliverables, and updates indexes (canon/constraints/README.md, docs/CONTENT-MAP.md, odd/constraint/README.md) to surface the new constraint/incidents content.

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