Feature: Receptor de webhooks interno para debug

- Endpoint POST /api/debug/webhook-receiver para recibir webhooks
- Almacenamiento en memoria de ultimos 100 eventos
- Endpoint GET/DELETE para consultar/limpiar eventos
- Nueva tab Webhooks en seccion Debug con polling cada 5s

server/services/debug/webhook-store.ts

@@ -0,0 +1,41 @@
+/**
+ * Debug Webhook Store
+ * Stores webhook events in memory for debugging
+ */
+
+interface WebhookEvent {
+  id: string
+  receivedAt: string
+  event: string
+  timestamp?: string
+  data: any
+  headers: Record<string, string | undefined>
+}
+
+class DebugWebhookStore {
+  private events: WebhookEvent[] = []
+  private maxEvents = 100
+
+  addEvent(event: WebhookEvent) {
+    this.events.unshift(event)
+
+    // Keep only the last N events
+    if (this.events.length > this.maxEvents) {
+      this.events = this.events.slice(0, this.maxEvents)
+    }
+  }
+
+  getEvents(limit: number = 50): WebhookEvent[] {
+    return this.events.slice(0, limit)
+  }
+
+  clear() {
+    this.events = []
+  }
+
+  getCount(): number {
+    return this.events.length
+  }
+}
+
+export const debugWebhookStore = new DebugWebhookStore()