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exam-marker: exam_response_areas.meta jsonb for extraction-service recognition detail (P2)

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Applied to dev Supabase .94 2026-07-02. Holds OMR box geometry, select_n, unit/quantity,
n_options from the extraction service. Additive + nullable. Pending prod (.156) apply — gated.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Hermes cc-worker 2026-07-02 23:47:34 +00:00
parent 7ba7523d1c
commit 0b6874a3dd
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volumes/db/cc/75-exam-marker-region-meta.sql Normal file
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--==========================================================================================
-- 75. exam_response_areas.meta — rich recognition payload from the extraction service (P2)
--==========================================================================================
-- The extraction service (docling-exam-spike analyse contract) returns richer per-region detail than
-- the thin first-pass could: per-option OMR box geometry + fill (boxes[]), select_n ("tick 2 of 5"),
-- n_options, the expected unit/quantity for single-line answers, and the data_table an MC question reads.
-- These have no dedicated columns; keep them in a jsonb sidecar so the canvas can render tick boxes /
-- units / MC option counts without a column per attribute. Nullable, defaults to {}.
alter table public.exam_response_areas add column if not exists meta jsonb not null default '{}'::jsonb;
comment on column public.exam_response_areas.meta is
'Extraction-service recognition detail: {n_lines, unit, quantity, n_boxes, n_options, select_n, box_form, boxes:[{x0,y0,x1,y1,fill}], table:{grid,n_cells}}. Rendered by the canvas; not authoritative for marking.';