feat(POS-009): completed feature

work/artifacts/POS-009/implementer.md

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+# POS-009 — Implementer evidence
+
+## What
+Added customer search + detail endpoints to pos.routes.ts. tsc 0, verify verde.
+
+## Files
+- `src/modules/pos/api/pos.routes.ts` — GET /pos/customers/search + GET /pos/customers/:id
+
+## Verification
+- `npm run build` → 0 TypeScript errors.
+- `./scripts/verify.sh` → green.