{"message":"E-Factura Backend API","version":"1.0.0","modules":{"clientes":{"auth":"POST /auth/login, /refresh, /logout, GET /auth/me","users":"GET /users/profile, /users/:id, /users (admin)","facturacionElectronica":"GET|POST /facturacion-electronica, GET|PUT|DELETE /facturacion-electronica/:id (admin)"},"gestion":{"base":"GET /gestion (base de datos por cliente)"},"health":"GET /health"}}