feat(search): index provider webhooks

internal/handler/webhook/whatsapp_webhook.go

@@ -78,6 +78,13 @@ func (h *WhatsAppWebhookHandler) WithWorkerPool(wp *worker.WorkerPool) *WhatsApp
 	return h
 }
 
+func (h *WhatsAppWebhookHandler) WithSearchIndexer(indexer IncomingSearchIndexer) *WhatsAppWebhookHandler {
+	if h != nil && h.persister != nil {
+		h.persister.SetSearchIndexer(indexer)
+	}
+	return h
+}
+
 type whatsAppPersisterAdapter struct {
 	persister *IncomingPersister
 }