feat: Add telemetry events for free AI credits feature (no-changelog) (#12459)

packages/workflow/src/TelemetryHelpers.ts

@@ -26,6 +26,7 @@ import type {
 	IDataObject,
 	IRunData,
 	ITaskData,
+	IRun,
 } from './Interfaces';
 import { getNodeParameters } from './NodeHelpers';
 
@@ -470,3 +471,21 @@ export function generateNodesGraph(
 
 	return { nodeGraph, nameIndices, webhookNodeNames };
 }
+
+export function extractLastExecutedNodeCredentialData(
+	runData: IRun,
+): null | { credentialId: string; credentialType: string } {
+	const nodeCredentials = runData?.data?.executionData?.nodeExecutionStack?.[0]?.node?.credentials;
+
+	if (!nodeCredentials) return null;
+
+	const credentialType = Object.keys(nodeCredentials)[0] ?? null;
+
+	if (!credentialType) return null;
+
+	const { id } = nodeCredentials[credentialType];
+
+	if (!id) return null;
+
+	return { credentialId: id, credentialType };
+}