Initial commit: sap-webhook-api

API NestJS que recibe el Webhook Messenger de SAP Business One
(CloudEvents), valida HMAC opcional y guarda cada notificacion
local (data/events/) e inserta en Postgres (webhook_events).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

nest-cli.json

@@ -0,0 +1,8 @@
+{
+  "$schema": "https://json.schemastore.org/nest-cli",
+  "collection": "@nestjs/schematics",
+  "sourceRoot": "src",
+  "compilerOptions": {
+    "deleteOutDir": true
+  }
+}