One row per upload through POST /api/intake, written BEFORE extraction so a
Slack tap minutes later has something to act on and a re-share (same sha256
set, or the same (platform, merchant, date, total) header already resolved)
is detected. Columns are the §11 C1 contract in smarthome
plans/intake-router-slice-plan.md. intake_merchant_kinds holds the remembered
'Groceries or a meal?' answer per normalised merchant (plan §2, Codex #6).
Not applied to production — finance has no migrate service; apply by hand at
deploy, then npm run test:setup.
