feat(POS-014): completed feature

work/artifacts/POS-014/architect.md

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+# POS-014 — Architect
+
+## Feature
+POS Phase 2/3 ticket 014: Shifts + tax rates + stores + notifications + daily/end-of-day reports.
+
+## Endpoints
+- GET /pos/shifts — list sessions by store/date
+- GET /pos/tax-rates — configured tax rates
+- GET /pos/stores — list all POS stores (admin)
+- GET /pos/notifications — low-stock + session alerts
+- GET /pos/reports/daily — daily sales summary
+- GET /pos/reports/end-of-day — EOD report (sessions + sales + by payment)