Cloud/tracking v2 (#6400)

## Summary

<!-- One sentence describing what changed and why. -->

## Changes

- **What**: <!-- Core functionality added/modified -->
- **Breaking**: <!-- Any breaking changes (if none, remove this line)
-->
- **Dependencies**: <!-- New dependencies (if none, remove this line)
-->

## Review Focus

<!-- Critical design decisions or edge cases that need attention -->

<!-- If this PR fixes an issue, uncomment and update the line below -->
<!-- Fixes #ISSUE_NUMBER -->

## Screenshots (if applicable)

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┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6400-Cloud-tracking-v2-29c6d73d365081a1ae32e9337f510a9e)
by [Unito](https://www.unito.io)

---------

Co-authored-by: Arjan Singh <arjan@comfy.org>

src/scripts/app.ts

@@ -18,6 +18,7 @@ import type { Vector2 } from '@/lib/litegraph/src/litegraph'
 import type { IBaseWidget } from '@/lib/litegraph/src/types/widgets'
 import { isCloud } from '@/platform/distribution/types'
 import { useSettingStore } from '@/platform/settings/settingStore'
+import { useTelemetry } from '@/platform/telemetry'
 import { useToastStore } from '@/platform/updates/common/toastStore'
 import { useWorkflowService } from '@/platform/workflow/core/services/workflowService'
 import { ComfyWorkflow } from '@/platform/workflow/management/stores/workflowStore'
@@ -1271,6 +1272,14 @@ export class ComfyApp {
       'afterConfigureGraph',
       missingNodeTypes
     )
+
+    // Track workflow import with missing node information
+    useTelemetry()?.trackWorkflowImported({
+      missing_node_count: missingNodeTypes.length,
+      missing_node_types: missingNodeTypes.map((node) =>
+        typeof node === 'string' ? node : node.type
+      )
+    })
     await useWorkflowService().afterLoadNewGraph(
       workflow,
       this.graph.serialize() as unknown as ComfyWorkflowJSON