[ shawnyeager/hugo-v4v ] feat: migrate invoice functions to edge functions
Backport from shawnyeager-com: move lnurl-callback and invoice-status
from serverless functions to edge functions for better performance
and simpler architecture.
- Add lnurl-callback.ts edge function (invoice generation via NWC)
- Add invoice-status.ts edge function (payment status polling)
- Add Deno-native nwc.ts (no WebSocket polyfill needed)
- Update config.ts with jsonResponse, alertFailure, ALBY_CALLBACK