feat(inventoryitem): reject non-finite invitQty at the schema layer#212
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`invitQty` was typed `z.coerce.number()`, which accepts the infinities and the coerce path turns the string `"Infinity"` into the float. An `inf` qty in the DOUBLE column silently corrupts every downstream consumer that does arithmetic against it — PO line receiving, inventory-transaction net-position rollups, valuation reports. Pin `.finite()` at the boundary via a shared `invitQtyField`. Zero and negatives remain valid: a 0 on-hand qty for an out-of-stock item is legitimate, and negative qtys cover backorders and historical reconciliation entries that some accounting flows allow. Mirrors polQtyField / polPriceField (#194) and btHourlyRateField (#206). Pinned in `tests/api/inventoryitem.test.js` with 4 new tests: non-finite rejection (POST + PATCH), zero accepted, negative accepted. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Closes #211.
Summary
invitQtywasz.coerce.number()— accepts the infinities."Infinity"from JSON coerces to the float, landsinfin the DOUBLE column, contaminates PO receiving / inventory-rollup arithmetic..finite()via sharedinvitQtyField. Mirrors polQty/polPrice (#194), btHourlyRate (#206). Zero + negatives remain valid (out-of-stock, backorders).Test plan
npm run lintcleannpm test— 659 → 663 (+4)Proudly Made in Nebraska. Go Big Red! 🌽 https://xkcd.com/2347/