EPP guided setup preview 2026-09-15

Preview packages matching feature/epp-external-phone-provider. Includes guided prerequisite installation, automatic tenant-specific Azure/Graph sign-in, provider-tenant restrictions, automated app/service-principal configuration, Epp.Invoke and Microsoft Graph Application.Read.All grants, encryption-certificate readback, Telesign API-key authentication, Soprano OAuth, and provider-owned Global/EU routes.