Initial commit: sap-legacy-webhook-emulator

Reconstruye el Webhook Messenger nativo de SAP B1 (FP2605) para
clientes que aun no estan en esa version: captura eventos via
SBO_SP_PostTransactionNotice, provisiona UserTables OEVC/EVC1/OEVN/EVN1
y despacha CloudEvents al mismo endpoint que el messenger real.

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

json/user-tables/EVC1.json

@@ -0,0 +1,41 @@
+{
+  "table": {
+    "TableName": "EVC1",
+    "TableDescription": "Webhook Subscription Filter",
+    "TableType": "bott_NoObject"
+  },
+  "fields": [
+    {
+      "TableName": "@EVC1",
+      "Name": "WebhookID",
+      "Description": "WebhookID",
+      "Type": "db_Alpha",
+      "Size": 40,
+      "EditSize": 40
+    },
+    {
+      "TableName": "@EVC1",
+      "Name": "BizObject",
+      "Description": "BizObject",
+      "Type": "db_Alpha",
+      "Size": 64,
+      "EditSize": 64
+    },
+    {
+      "TableName": "@EVC1",
+      "Name": "TransType",
+      "Description": "TransType",
+      "Type": "db_Alpha",
+      "Size": 1,
+      "EditSize": 1
+    },
+    {
+      "TableName": "@EVC1",
+      "Name": "ObjectType",
+      "Description": "ObjectType",
+      "Type": "db_Alpha",
+      "Size": 30,
+      "EditSize": 30
+    }
+  ]
+}