feat: add e-signature, products, orders, invoicing tables and API (#192, #197)
Database schema (10 new tables):
- erp_esign_requests/signers/events — full e-signature lifecycle with
encrypted selfie/ID verification, 128-char tokens, audit trail
- erp_products — lightweight catalog linked to #__content articles
- erp_orders/order_items — order management with status tracking
- erp_invoices/invoice_items — invoicing with standard/credit/recurring
- erp_payments — payment tracking with gateway transaction IDs
API controllers:
- ErpSignRequestsController — signature request CRUD with signer
management, auto-ref generation (SIG-YYYY-NNN), audit logging
Routes registered for products, orders, invoices, payments, e-signature
Jonathan Miller
2e77514aa7