# Task 12 — Export: SQLite

## Goal
Portable single-file SQLite database conforming to the ontology.

## Input
- `canonical/` snapshot, `schema/ddl_postgresql.sql`.

## Actions
1. Write `scripts/export_sqlite.py`: translate DDL to SQLite dialect (bigint→INTEGER, timestamptz→TEXT ISO, keep FKs), create `exports/sqlite/labdata.sqlite`.
2. Bulk-load in dependency order (hierarchy → lookups → headers → points); `executemany` in transactions; create indexes after load; `PRAGMA journal_mode=OFF, synchronous=OFF` during load, `ANALYZE` after.
3. Load `measurement_types`, `column_definitions`, `instruments` tables; add `lineage` table (row-range level, not per-row, to bound size).

## Intermediate Result (done when)
- `labdata.sqlite` opens; per-table row counts equal canonical counts; FK integrity check passes (`PRAGMA foreign_key_check` empty).
- `exports/sqlite/EXPORT_MANIFEST.json` written.