Adds docs/integration-enakpoint.md for the customer app, POS and dashboard
teams (PC-602), in the style of the weight-based products guide.
It covers the response envelope and error codes, balances and history with
every ledger type, the expiring list and FCM push types with their data,
the PIN flows and the four PIN error codes, paying with EnakPoint at the
cashier (payment code, preview, POST /payments) and in the app, void and
refund rules, exchange and transfer with Idempotency-Key, games on
EnakCoin, the deprecated endpoints and fields with their replacements, the
dashboard's outlet and organization settings including both expiry models,
the customer wallet, adjustments, trace and PIN removal, and a checklist
per team.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
efrilm
