Transitioned from obsolete gateway object classes (`edge_gateway_shell_action_jobs_o`, `edge_gateway_shell_events_o`, `edge_gateway_shell_sessions_o`, `edge_gateway_update_jobs_o`) to the new agent implementation (`edge-gateway-agent/agent.php`).
Introduced functionality for creating and managing invoices using Stripe APIs, replacing the previous payment link system. Added customer account creation and retrieval, invoice line-item handling, and extended database object structures to support invoices. Updated order routing to include Stripe customer and invoice details.