exam-marker: exam_templates.extraction_meta jsonb (P3 audit gate + provenance)

Applied to dev .94 2026-07-03. {engine, slug, audit:{cover_total,detected_total,status,anomaly}, counts}.
Pending prod (.156) — gated.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Hermes cc-worker 2026-07-03 02:12:44 +00:00
parent 0b6874a3dd
commit c4ca0ae29f

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--==========================================================================================
-- 76. exam_templates.extraction_meta — trust signal + provenance from the extraction service (P3)
--==========================================================================================
-- Records, per template, how the recognition was produced and whether it reconciled: the audit
-- cover-total gate (cover_total vs detected_total, status, anomaly), the engine + slug used, and
-- region counts. Lets the setup UI show "extraction: cover 100 = detected 100 ✓" (or flag an under-read),
-- and lets the digital-text view resolve the paper's replica by slug. Nullable, defaults to {}.
alter table public.exam_templates add column if not exists extraction_meta jsonb not null default '{}'::jsonb;
comment on column public.exam_templates.extraction_meta is
'Extraction-service provenance + trust gate: {engine, slug, audit:{cover_total,detected_total,status,anomaly}, counts}.';